Chemistry Test 212

Result

Chemistry Test 212

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

The radiations from a naturally occurring radioactive substance, as seen after deflection by a magnetic field in one direction, are

A
definitely alpha rays

B
definitely beta rays

C
both alpha and beta rays

D
either alpha or beta rays

Solution

Deflection in the magnetic field confirms that the particles are charged. It does not confirm the charge on the particles.

Hence, option (4) is correct.

α-rays consist of positively charged particles (He⁺⁺) and β-rays consist of negatively charged particles . Since they are oppositely charged, so they get deflected in opposite directions. γ-rays are neutral (carry no charge). So, they remain undeflected.
Question 2
4 / -1

Both the molecules possess dipole moment in which of the following pairs?

A
CO₂, SO₂

B
BCl₃, PCl₃

C
H₂O, SO₂

D
CO₂, CS₂

Solution

H₂O and SO₂ both possess dipole moment due to bent structure.
Question 3
4 / -1

Which of the following solutions will have pH close to 1.0?

A
100 mL of (M/10) HCl + 100 mL of (M/10) NaOH

B
55 mL of (M/10) HCl + 45 mL of (M/10) NaOH

C
10 mL of (M/10) HCl + 90 mL of (M/10) NaOH

D
75 mL of (M/5) HCl + 25 mL of (M/5) NaOH

Solution
Question 4
4 / -1

Out of H₂S₂O₃, H₂S₄O₆, H₂SO₅ and H₂S₂O₈, peroxy acids are

A
H₂S₂O₃ and H₂S₄O₆

B
H₂S₄O₆ and H₂SO₅

C
H₂SO₅ and H₂S₂O₈

D
H₂S₂O₃ and H₂S₂O₈

Solution

A peroxy acid (sometimes called peracid) is an acid which contains an acidic -OOH group. H₂SO₅ and H₂S₂O₈ are peroxy acids as shown in their structures.
Question 5
4 / -1

Geometrical shapes of the complexes formed by the reaction of Ni²⁺ with Cl^-, CN^- and H₂O, respectively, are

A
octahedral, tetrahedral and square planar

B
tetrahedral, square planar and octahedral

C
square planar, tetrahedral and octahedral

D
octahedral, square planar and octahedral

Solution
Question 6
4 / -1

Propan-1-ol can be prepared from propene by

A
H₂O/H₂SO₄

B
Hg (OAc)₂ /H₂O followed by NaBH₄

C
B₂H₆ followed by H₂O₂

D
CH₃CO₂H/H₂SO₄

Solution

Propan-1-ol can be prepared from propene by anti-Markownikoff addition as shown below

(The above reaction follows Markownikoff's rule and 2-propanol will be obtained instead of 1-propanol.)
Question 7
4 / -1

How many structures of F are possible?

A
2

B
5

C
6

D
3

Solution
Question 8
4 / -1

The order of acidity of the following compounds is

A
IV > II > III > I

B
IV > II > I > III

C
I > II > III > IV

D
II > IV > III > I

Solution

Presence of OH groups, ortho to COOH, increases the acidity of the compound. The main reason being the stabilisation of carboxylate ion through hydrogen bonding with OH group. Presence of OH group at p-position reduces acidity. Thus, the correct order should be IV > II > I > III.

This is the correct order.
Question 9
4 / -1

In the following reaction, predict the compounds X and Y.

A

B

C

D

Solution
Question 10
4 / -1

Which of the following does not exist as a zwitter ion?

A
Glycine

B
Glutamic acid

C
Sulphanilic acid

D
p-aminobenzoic acid

Solution

The lone pair of electrons on the -NH₂ group is donated towards the benzene ring due to resonance effect. As a result, acidic character of -COOH group and basic character of -NH₂ group decrease. Therefore, the weakly acidic -COOH group cannot transfer an H⁺ ion to the weakly basic -NH₂ group. Thus, o- and p-aminobenzoic acids do not exist as zwitter ions.