Chemistry Test 161

Result

Chemistry Test 161

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Weekly Quiz Competition

Question 1
4 / -1

In the above sequence X can be:

A

B

C

D
Both (a) and (b)

Solution
Question 2
4 / -1

Nitrosoamines are insoluble in water. On heating with conc. H₂SO₄, they give secondary amines. The reaction is called

A
Liebermann nitroso reaction

B
Etard reaction

C
Fries reaction

D
Perkin reaction

Solution
Question 3
4 / -1

If one strand of DNA has the sequence ATGCTTGA, the sequence in the complimentary strand would be

A
TACGAACT

B
TCCGAACT

C
TACGTACT

D
TACGTAGT

Solution

On the basis of structure of guanine and complementary bases present in them, we can say that if the sequence of bases in one strand of DNA is I, then the sequence in the second strand should be II
Question 4
4 / -1

Which of the following catalyst is used in preparation of high density polythene?

A
Peroxide catalyst

B
Ziegler - Natta catalyst

C
Wilkinson’s catalyst

D
Pd - catalyst

Solution

High density polythene is formed when addition polymerisation of ethene takes place in a hydrocarbon solvent in presence of catalyst such as Ziegler-Natta catalyst.
Question 5
4 / -1

Which one of the following can possibly be used as analgesic without causing addiction and mood modification?

A
Diazepam

B
Morphine

C
N-Acetyl-para-aminophenol

D
Tetrahydrocannabinol

Solution

We know that N-acetyl-para-aminophenol (or paracetamol) is an antipyretic which can also be used as an analgesic to relieve pain.
Question 6
4 / -1

Haemoglobin contains 0.33% of iron by weight. The molecular weight of haemoglobin is approximately 67200. The number of iron atoms (at. wt. of Fe = 56) present in one molecule of haemoglobin is

A
6

B
1

C
2

D
4

Solution
Question 7
4 / -1

If uncertainty in position and momentum are equal, then uncertainty in velocity is:

A

B

C

D

Solution
Question 8
4 / -1

The incorrect statement among the following is

A
The first ionization potential of Al is less than the first ionization potential of Mg

B
The second ionization potential of Mg is greater than the second ionization potential of Na

C
The first ionization potential of Na is less than the first ionization potential of Mg

D
The third ionization potential of Mg is greater than the third ionization potential of Al.

Solution

of Mg is lower than that of Na because in case of Mg⁺, 3s-electron has to be removed whereas in case of Na⁺ , an electron is removed from the stable inert gas configuration which is difficult.
Question 9
4 / -1

Which molecule/ion out of the following does not contain unpaired electrons?

A

B
O₂

C

D
B₂

Solution

The electronic configuration of the given molecules are:
Question 10
4 / -1

A
1.0

B
4.5

C
1.5

D
3.0

Solution