WBJEE 2015 (Chemistry – Category 1) Model Test

WBJEE - Chemistry (Category - 1) Model Test

Please wait while the activity loads.
If this activity does not load, try refreshing your browser. Also, this page requires javascript. Please visit using a browser with javascript enabled.

If loading fails, click here to try again

Start

Congratulations - you have completed WBJEE - Chemistry (Category - 1) Model Test. You scored %%SCORE%% out of %%TOTAL%%. Your performance has been rated as %%RATING%%

Your answers are highlighted below.

Question 1

When a stream of chlorine gas is passed through an aqueous solution of potassium iodide for a long period of time at room temperature

A	the solution turns violet-black
B	the solution throughout remains colourlrss
C	the solution becomes deep brown and then colourless
D	the solution provides a heavy white precipitate

Question 2

Arrange the following in decreasing order of reactivity with HCN. HCHO, CH₃CHO, CH₃COCH₃

A	HCHO > CH₃CHO > CH₃COCH₃
B	CH₃CHO > HCHO > CH₃COCH₃
C	CH₃COCH₃ > CH₃CHO > HCHO
D	CH₃CHO > CH₃COCH₃ > HCHO=

Question 3

Deoxyribose is:

A	an aldopentose with four hydroxyl groups
B	a ketopentose with four hydroxyl groups
C	an aldopentose lacking hydroxyl group at carbon-3
D	an aldopentose lacking hydroxyl group at carbon-2

Question 4

The unit of the rate constant for a first order reaction is:

A	sec^-1
B	mol.L^-1.sec^-1
C	L.mol^-1.sec^-1
D	L².mol^-2.sec^-1

Question 5

The state of hybridization of the nitrogen atom bonded to hydrogen in hydrazoic acid (N₃H) is:

A	sp
B	sp²
C	sp³
D	none of these.

Question 6

Which of the following sets of quantum numbers (n,l,m_l,m_s) correctly represents an electron in the 5f subshell?

A	5, 3, 4, +½
B	5, 2, 1, 0
C	5, 3, −2, +½
D	5, 5, 2, −½

Question 7

(S)-(+)-lactic acid and (R)-(–)-lactic acid are nonsuperposable mirror images of each other. They are called

A	diastereomers
B	tautomers
C	enantiomers
D	structural isomers

Question 8

A reducing agent

A	loses electrons and is reduced.
B	gains electrons and is reduced.
C	loses electrons and is oxidized.
D	gains electrons and is oxidized

Question 9

The cathode is slowly raised out of the melt by an electrical device during the electrolytic extraction of:

A	sodium
B	magnesium
C	calcium
D	aluminium

Question 10

Which of the following species has the maximum number of unpaired d-electrons?

A	Zn
B	Fe²⁺
C	Ni²⁺
D	Cu⁺

Once you are finished, click the button below. Any items you have not completed will be marked incorrect. Get Results

There are 10 questions to complete.

←

List

→

Return

Shaded items are complete.

1	2	3	4	5
6	7	8	9	10
End

Return

WBJEE 2015 (Chemistry – Category 1) Model Test

WBJEE - Chemistry (Category - 1) Model Test

Categories