Chemistry Multiple Choice Questions Set – 48

Here you will find GK MCQ Questions for Chemistry GK with Answers PDF Free Download based on the important concepts and topics given in the textbook as per new exam pattern. This may assist you to understand and check your knowledge about the Chemistry GK. Students also can take a free test of the Multiple Choice Questions of Chemistry GK. Each question has four options followed by the right answer.

Question 1.

Cement is usually a mixture of :

A. Calcium silicate and calcium aluminate
B. Calcium silicate and calcium ferrate
C. Calcium aluminate and calcium ferrate
D. Lime stone and silicon dioxide

Ans: A. Calcium silicate and calcium aluminate

Question 2.

Oxygen has (+) oxidation number only in

A. OF2
B. C12O
C. H2O (2)
D. N2O

Ans: A. OF2

Question 3.

A subshell with l = 2 can take up

A. 3 electron
B. 5 electron
C. 8 electron
D. 10 electron

Ans: D. 10 electron

Question 4.

Sodium bicarbonate is commercially known as

A. Washing soda
B. Baking soda
C. Caustic soda
D. Soda lime

Ans: B. Baking soda

Question 5.

The oxidation number of nickel in K4[Ni(CN)4] is

A. Zero
B. +4
C. –4
D. +8

Ans: A. Zero

Question 6.

Two electrons in an orbital are differentiated by which of the following ?

A. Magnetic quantum number
B. Spin quantum number
C. Principal quantum number
D. Azimuthal quantum number

Ans: B. Spin quantum number

Question 7.

Which of the following is the main nitrogenous waste in humans ?

A. Ammonia
B. Urea
C. Uric Acid
D. Ammonium Nitrate

Ans: C. Uric Acid

Question 8.

How many neutrons are there in 92U238 atom ?

A. 92
B. 238
C. 146
D. 330

Ans:C. 146

Question 9.

When cathode rays strike a target of high atomic weight, they give rise to

A. alpha-rays
B. beta and gamma rays
C. X-rays
D. Positive rays

Ans: C. X-rays

Question 10.

Quartz is a crystalline form of

A. Alumina
B. Glass
C. Silica
D. Limestone

Ans: C. Silica

Question 11.

The number of neutrons present in an element having mass number 226 and atomic number 88 is :

A. 88
B. 138
C. 314
D. 50

Ans: B. 138

Question 12.

How many electrons can be accommodated in d-orbital?

A. 3
B. 6
C. 8
D. 10

Ans: D. 10

Question 13.

Urea is a

A. Sodium fertilizer
B. Phosphatic fertilizer
C. Nitrogenous fertilizer
D. Potassium fertilizer

Ans: C. Nitrogenous fertilizer

Question 14.

Who modified Bohr’s theory by introducing elliptical orbits for electron path?

A. Hund
B. Thomson
C. Rutherford
D. Sommerfeld

Ans: D. Sommerfeld

Question 15.

The scientist who experimentally proved the existence of positron is

A. Fermi
B. Anderson
C. Bohr
D. Bethe

Ans: B. Anderson

Chemistry GK MCQs all set

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