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                                                                     Mcqs	on	chemical	kinetics	with	answers
  Resources	for	students	Multiple	Choice	Questions	Teacher	Resources	Browse	Figures:	All	subjects	Pharmacy	Learn	more:	Online	Resource	Centres	VLE/CMS	Content	Test	Banks	From	our	catalog	pages:	Find	a	textbook	Find	your	local	representative	Reply	to	the	following	questions	and	then	press	'Submit'	to	get	your	score.	Congratulations	-	you
  have	completed	Topic:	Chemistry	Kinetics,	Test	No.:	03,	Total	MCQs:	15.You	have	scored	%%%%%%%%%TOTAL%.	Your	performance	has	been	evaluated	in	%%RATING%	Your	answers	are	highlighted	below.	There	are	15	questions	to	complete.	Description	This	Kinetics	Chemistry	Mock	Test	for	Chemistry	helps	you	for	every	Chemistry	Input	Exam.
  This	contains	20	multiple-choice	questions	for	Chemistry	Chemistry	Kinetics	(mcq)	to	study	with	solutions	a	complete	bank	question.	Fixed	questions	answer	in	this	Chemical	Kinetics	quiz	give	you	a	good	mix	of	easy	questions	and	difficult	questions.	Chemistry	students	will	definitely	take	this	exercise	of	kinetic	chemistry	for	a	better	result	in	the
  examination.	You	can	find	additional	questions	about	Chemistry	Kinetics,	long	and	short	questions	for	Chemistry	on	EduRev	and	also	looking	over.	If	A	reacts	to	form	B	or	C	based	on	reactions,	if	E1	is	the	activation	energy	for	the	first	reaction	and	E2	is	the	activation	energy	for	the	second	reaction	then	Ea,	the	activation	energy	observed	for	the
  disappearance	of	A	is	Solution:	The	following	reaction	was	carried	out	in	water	the	initial	concentration	of	was	0.25	molL-1	and	the	concentration	after	10	min	was	0.23	molL-1.	The	disappearance	rate	of	I-	(in	untis	of	M	min-1)	and	the	emergence	rate	of	I2	.	For	reaction,	A	+	B	→	C	+D,	Δh	=	20	kJ/mole.	The	reaction	activation	energy	forward	is	85
  kJ/mole.	Reverse	Reaction	Solution	Activation	Energy:	*Answer	can	contain	only	numerical	values	The	reaction	order	is	___________________	Solution:	For	theorder	when	concentration	is	interrupted	interrupteddouble.	*Answer	can	contain	only	numerical	values	For	the	following	sequential	reaction,	the	time	when	[B]	maximum	is	______(in	sec).
  Solution:	*Answer	can	contain	only	numerical	values	The	percentage	transmittance	of	a	solution	with	absorption	(optic	density)	1.0	is	__________	Solution:	Which	of	the	following	curves	represent	a	zero	order	reaction	Solution:	A	catalyst	increases	the	chemical	reaction	rate	of	(1)	by	increasing	the	activation	energy	(2)	by	decreasing	the	activation
  energy	(3)	by	increasing	the	K.E.	average	of	the	molecule	(4)	by	increasing	the	number	of	active	molecules.	Solution:	The	elementary	reaction	rate	at	25oC	It	is	given	by	rate	=	1.7	x	10-18[H2][I2]	-	2.4	x	10-21	[HI]	The	decomposition	rate	of	HI	gaeseous	at	H2	and	I2	at	25o	C	is	given	by	the	constant	balance	for	the	formation	of	HI	from	H2	and	I2	to
  25o	C	is	Solution:	Is	the	constant	time	τ	necessary	for	a	reactor	to	fall	to	1/e	of	its	initial	value	then?	Solution:	For	the	first	order	reaction,	A	is	4.3	x	1013	s-1	and	Ea	is	103.35	KJ/mole.	The	value	of	k	to	300K	is	Solution:	Frequency	factors	for	a	non-molecular	gas	reaction	that	occurs	at	473K	is	2.5×1013	s–1	.	The	activation	entropy	value	is	Solution:
  Cyclohexane	inter	converts	between	a	chair	and	a	boat	structure.	The	activation	parameters	for	reaction	from	chair	to	the	shape	of	the	molecule	boat	are	Gibbs'	standard	energy	value	and	rate	constant	and	rate	constant	for	this	reaction	to	325K	Solution:	The	Co(g)	reaction	rate	law	to	form	phosgen	(Cl2CO)	shows	that	the	following	mechanism	is
  consistent	with	this	rate	law	(Fast	Balance)	(Slow)	where	M	is	any	gas	molecule	present	in	the	reaction	container.	The	value	of	kobs	in	terms	of	rate	constants	for	the	individual.	Phases	of	the	reaction	mechanism	Solution:	Using	the	third	step	of	the	reaction	mechanism	to	write	d[CL2CO]	/	dt	andcan	contain	only	numerical	values	A	substance,	when
  dissolved	in	water	at	10-3	M,	absorbs	10%	of	radiation	incident	in	a	path	of	1	cm	long.	What	should	be	the	concentration	of	the	solution	if	it	were	to	absorb	90%	of	the	same	radiation?	Solution:	*Answer	can	contain	only	numerical	values	For	a	reaction	with	the	equation	of	the	rate	-	dc/dt	=	kc2,	Co	and	C	are	the	concentration	of	the	reactor	at	zero
  time	and	t	respectively.	If	10	minutes	were	needed	to	C0	to	become	C0/2	the	time	needed	for	Co	to	become	C0/4	is	______min.	(The	answer	should	be	a	whole	one).	Solution:	For	integration	taking	time	0	to	t,	we	get	...(s)	*Answer	can	contain	only	numerical	values	The	concentration	of	the	non-competitive	inhibitor	(k1	=	2.9	x	10-4	Moldovam-3)
  required	to	produce	90%	inhibiting	a	catalyst	reaction	of	the	enzyme	is	________mol	dm-3.	(Get	out	two	decimal	points).	Solution:	...(i)	...(ii)(i)(i)/(iii),	we	get	*The	answer	may	contain	only	numerical	values	During	the	nuclear	explosion,	one	of	the	products	is	90Sr	with	half-life	is	28.1	year.	If	1μg	or	90Sr	has	been	absorbed	into	the	bones	of	a	newborn
  instead	of	calcium.	How	much	of	it	will	remain	after	10	year	if	it	is	not	metabolically	lost?	(in	units	of	μg)	(Sent	two	decimal	points).	Solution:	*Answer	can	contain	only	numerical	values	In	a	homogeneous	catalytic	reaction,	1.0	M	of	a	substrate	band,	1.0	μM	of	a	1.0	mM	catalyst	yield	of	a	product	in	10S.	The	frequency	of	turnover	(TOF)	of	the	reaction
  (s-1)	is	__________(response	should	be	an	entire)	Solution:	In	the	Linewear	Burk	plot	of	(initial	cut)–1	vs	(initial	substrate	concentration)–1.	For	a	catalyzed	enzyme	reacts	by	following	Michael	Menten's	mechanism.	The	interception	is	6000	M–1.	If	the	initial	concentration	of	the	enzyme	is	1×10–5	M.	The	number	of	laps	is	Solution:	We	compiled	NCERT
  MCQ	questions	for	Class	Chemistry	12	Chapter	4	Chemistry	Kinetics	withPdf	free	download	covering	the	entire	program.	Practice	MCQ	questions	for	class	chemistry	12	with	answers	on	a	onebase	and	score	well	in	exams.	refer	to	questions	of	answers	of	the	class	12	mcq	of	chemical	kinetics	with	a	detailed	explanation.	chemical	kinetics	class	12	mcq
  questions	with	answers	question	1.	for	a	chemical	reaction,	x	+	2y	→	z,	if	the	z	emergence	rate	is	0.50	molecules	per	liter	per	hour,	then	the	y	disappearance	rate	is	(a)	0.5	mol	L-1	hr-1	(b)	1.0	mol	L-1	hr-1	(c)	0.25	mol	L-1	hr-1	(d)	cannot	be	expected	answer:	(b)	1.0	mol	L-1	hr-1	question	2.	for	the	reaction,	no2	(g)	+	co	(g)	→	no	(g),	the	correct
  expression	for	the	reaction	rate	is	(a)	rate	=	(\frac	{-d[NO_2]}{dt}\)	(b)	rate	=	(\frac	{-d[CO_2]}{dt}\)	(c)	rate	=	(\frac	{d[NO_2]-d[CO]}{\	(a)	rate	=	(\frac	{-d[NO_2]}{dt}\)	question	3.	the	rate	of	a	reaction	is	determined	mainly	by	the	slower	step.	this	step	is	called	(a)	step	determination	rate	(b)	activation	step	(c)	reaction	step	(d)	none	of	these.
  reply:	(a)	rate	which	determines	the	question	step	4.	high	molecular	reaction	is	rare	because	(a)	many	body	collisions	have	a	low	probability.	(b)	many	bodily	collisions	are	not	energetically	favored.	(c)	the	activation	energy	of	many	body	collisions	is	very	large	(d)	the	very	high	concentration	is	necessary	for	such	reactions.	reply:	(a)	many	bodily
  collisions	have	a	low	probability.	Question	5.	for	a	chemical	reaction	to	→	b,	it	turns	out	that	the	rate	of	reaction	is	quardruples	when	the	concentration	of	a	is	doubled.	the	rate	expression	for	the	reaction	is,	rate	=	k	[A]n	where	the	value	of	n	is	(a)	1	(b)	2	(c)	0	(d)	3	answer:	Question	6.	on	increase	of	the	temperature	of	the	reaction	system	of	10°	the
  reaction	rate	becomes	almost	double.	the	most	appropriate	reason	for	this	is	that	(a)	activation	energy	decreases	by	temperature	increases	(b)	the	fraction	of	molecules	having	threshold	energy	increases	(c)	increases	the	frequencyCollision	(d)	The	threshold	energy	value	decreases.	decreases.Answer:	(b)	The	fraction	of	molecules	with	threshold
  energy	increases	demand	7.	The	half-life	period	of	any	first-order	reaction	(a)	is	half	of	the	specific	rate	constant	(b)	is	always	the	same	regardless	of	reaction	(c)	is	independent	of	the	initial	concentration	(d)	directly	proportional	to	the	initial	concentration	of	reactive.	Answer:	(c)	is	independent	of	the	initial	concentration	Question	8.	The	constant	rate
  of	reaction	of	2nd	order	involves	(a)	concentration	(b)	concentration	and	time	(c)	time	only	(d)	neither	time	nor	concentration.	Answer:	(b)	concentration	and	time	Question	9.	A	zero	order	reaction	A	→	Products,	has	constant	rate	10-2	harassment	L-1	s-1.	If	a	process	has	started	with	10	A-half	in	a	one-liter	container,	the	number	of	reagent	molecules
  after	10	minutes	will	be	(a)	10	(b)	5	(c)	6	(d)	4.	Answer:	(d)	4.	Question	10.	For	which	of	the	following	reactions,	is	the	temperature	coefficient	maximum?	(a)	A	→	B	:	Ea	=	50	kJ	(b)	P	→	Q	:	Ea	=	40	kj	(c)	X	→	Y	:	Ea	=	60kJ	(d)	W	→	Z	:	Ea	=	80kJ	Answer:	(d)	W	→	Z:	Ea	=	80kJ	Question	11.	A	hypothetical	reaction	2p	+	q	→	s	+	r	has	constant	rate	as	2.0	×
  10-3	mol	L-1	s-1.	The	order	of	reaction	is	(a)	unpredictable	(b)	zero	(c)	one	(d)	two	Answer:	Question	12.	The	ratio	t7/8	:	t1/2	for	the	first	order	is	(a)	3	(b)	5	(c)	2	(d)	7	Response:	(a)	3	Question	13.	The	molecularity	of	the	reaction	cannot	be	(a)	1	(b)	2	(c)	1.5	(d)	3.	Answer:	(c)	1.5	Question	14.	For	the	first	order	reaction,	the	half-life	is	independent	of	(a)
  catalyst	(b)	temperature	(c)	both	catalyst	and	temperature	(d)	initial	concentration	of	reactive.	Answer:	(d)	initial	concentration	of	reactives.	Question	15.	For	a	certain	reaction	toA	→	bB,	the	reaction	rate	doubled	when	the	A	concentration	increased	four	times.	The	reaction	of	the	ot	rate	is	equal	to	(a)	k[A]a	(b)	k[A]1/2	(c)	k[A]1/a	(d)	k[A].	Answer:	(b)
  k[A]1/2	Question	16.	The	Law	on	Rateschemical	reaction,	2no2cl	→	2no2	+	cl2	is	r	=	k[NO2Cl].	which	of	the	following	is	the	rate	control	step?	(a)	no2	+	cl	→	no2cl	(b)	no2cl	+	cl	→	no2	+	cl2	(c)	no2cl	→	no2	+	cl	(d)	2no2cl	→	2no2cl	+	cl2	reply:	(c)	no2cl	→	no2	+	cl	question	17.	constant	rate	of	a	reaction	depends	on	(a)	temperature	(b)	time	(c)	initial
  concentration	(d)	no	response:	(a)	temperature	application	18.	ddt	on	exposure	to	water	decomposes.	half	life	=	10	years.	how	long	will	it	take	for	its	decomposition	to	90?%	(a)	50	years	(b)	70	years	(c)	500	years	(d)	700	years.	reply:	(b)	70	years	in	question	19.	the	rate	of	a	first-order	reaction	is	1.5	×	10-2	mol	L-1	min-1	to	0.5	m	reactor	concentration.
  the	half-life	of	the	reaction	is	(a)	0.383	mm	(b)	23.1mm	(c)	8.73	mm	(d)	7.53	mm	answer:	(b)	23.1mm	question	20.	the	rate	equation	for	reaction	2a	+	b	→	c	is	found	to	be:	rate	=	k	[a]	[b.]	the	correct	insection	of	statement	to	this	reaction	is	that	the	unit	(a)	of	r	must	be	s-1	(b)	t1/2	is	constant	(c)	rate	of	formation	of	c	is	double	the	disappearance	rate	of
  a.	(d)	k	value	is	independent	of	the	initial	concentration	of	a	and	b.	response:	(d)	the	value	of	k	is	independent	from	the	initial	concentration	of	a	and	b.	application	21.	the	reaction	2	so2	(g)	+	o2	(g)	̄	so3	(g)	is	carried	out	in	1	ship	dm3	and	2	vessel	dm3	separately.	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	x	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ
  1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1	χ	1
  χ	1	χ	1	χ	1	χ	1	χ	1	χ	a)	the	order	of	a	reaction	can	be	determined	experimentally.	(b)	is	the	sum	of	the	powers	of	the	terms	of	concentration	in	the	expression	of	the	right	of	rates.	e)	not	necessarilyon	the	stoichiometric	coefficients.	(d)	The	order	of	a	reaction	cannot	be	fractional.	Answer:	(d)	The	order	of	a	reaction	cannot	be	fractional.	Question	24.
  t1/4	may	be	taken	as	the	time	necessary	for	the	concentration	of	a	reactor	to	descend	to	3/4	of	its	initial	value.	If	the	constant	rate	for	a	first-order	reaction	is	K,	then	t1/4	can	be	written	as	(a)	0.10/K	(b)	0.29/K	(c)	0.69/K	(d)	0.73/K	Response:	(b)	0.29/K	Question	25.	Collision	The	theory	is	applicable	to	(a)	first-order	reactions	(b)	zero-order	reactions	(c)
  biomolecular	reactions	(d)	intramolecular	reactions.	Answer:	(c)	Biomolecular	reactions	Question	26.	The	reaction	A	→	B	follows	the	first	order	kinetics.	The	time	spent	for	0.8	A	to	produce	0.6	B	is	1	hour.	What	is	the	time	needed	to	convert	0.9	harassment	of	A	to	produce	0.675	harassment	of	B?	(a)	1	hour	(b)	0.5	hour	(c)	0.25	hour	(d)	2	hours.
  Answer:	Question	27.	The	potential	energy	diagram	in	the	R	→	P	reaction	is	given.	The	reaction	corresponds	to	energy.	(a)	a	(b)	b	(c)	c	(d)	a	+	b	Reply:	Question	28.	The	reaction	rate	between	two	reactives	A	and	B	decreases	by	a	factor	of	4	if	the	concentration	of	reactor	B	is	doubled.	The	order	of	this	reaction	to	reactor	B	is	(a)	2	(b)	-1	(c)	1	(d)	-2
  Response:	(d)	-2	Question	29.	By	reaction	to	A	→	xP,	when	[A]	=	2.2	mM	the	rate	was	found	at	2.4	mMs-1.	By	reducing	the	concentration	of	A	to	half,	the	rate	changes	to	0.6	mMs-1.	The	reaction	order	compared	to	A	is	(a)	1.5	(b)	2.0	(c)	2.5	(d)	3.0	Response:	(b)	2.0	Question	30.	The	semi-levels	of	two	samples	are	0.1	and	0.4	seconds.	Their	respective
  concentrations	are	200	and	50	respectively.	What	is	the	order	of	reaction?	(a)	0	(b)	2	(c)	1	(d)	4	Response:	(b)	2	Question	31.	In	a	first-order	reaction,	the	concentration	of	the	reactor	decreases	from	800	mol/dm3	to	50	mol/dm3	in	2	×	104	sec.	The	constant	rate	for	reaction	in	sec-1	(a)	2	×	104	(b)×	10-5	(c)	1.386	×	10-4	(d)	2	×	10-4	Response:	(c)
  1.386	×	10-4	Question	32.	For	reaction	A	+	B	→	C	+	D,	doubling	the	concentration	of	both	reactionants	increases	the	reaction	rate	of	8	times	and	doubling	the	concentration	of	only	B	simply	doubles	the	reaction	rate.	The	tax	law	is	indicated	as	(a)	r	=	k[A]\(\frac	{1}{2}\)	[B]\(\frac	{1}{2}\\\\)	(b)	r	=	k	[A]2	(c)	r	–	k	[A]2	[B]	(d)	r	=	k	[A]	[B]	[B]	[B]	[B]
  [B]]]	Question	33.	In	Arrhenius	plpt,	interception	is	equal	to	(a)	-Ea/R	(b)	ln	A	(c)	ln	k	(d)	log10	to	Reply:	Question	34.	The	constant	rate	for	reaction	2N2O5	→	4NO2	+	O2	is	3.0	×	10-5	sec-1.	If	the	rate	is	2.40	×	10-5	mol	litre-1	sec-1,	then	the	concentration	of	N2O5	(in	mol	litre-1)	is:	(a)	1.4	(b)	1.2	(c)	0.04	(d)	0.8	Response:	Question	35.	When	a
  biochemical	reaction	is	carried	out	in	the	laboratory	from	the	outside	of	the	human	body	in	the	absence	of	enzyme,	then	the	reaction	rate	obtained	is	10-6	times,	so	the	reaction	activation	energy	in	the	presence	of	enzyme	is:	(a)	6/RT	(b)	Pis	required	(c)	Different	from	Ea	obtained	in	the	laboratory	(d)	Can	not,	say	nothing	Answer:	(c)	Different	from	Ea
  obtained	in	laboratory	Question	36.	If	«I»	is	the	intensity	of	the	absorbed	light	and	«C»	is	the	concentration	of	AB	for	the	photochemical	process	AB	+	hv	→	AB+,	the	training	rate	of	AB*	is	directly	proportional	to:	(a)	C	(b)	l2	(d)	Cl.	Question	37.	In	the	following	reaction,	how	is	the	rate	of	emergence	of	the	underlined	product	concerning	the
  disappearance	rate	of	the	underlined	reactor?	(c)regarding	ncert	mcq	questions	for	class	chemistry	12	chapter	4	chemical	with	answers	free	download	of	pdf	was	useful	to	a	measure.	if	you	have	other	questions	of	cbse	class	12	chemistry	kinetics	mcqs	multiple	choice	questions	with	answers,	do	not	hesitate	to	reach	us	so	that	we	can	go	back	to	us	as
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