Practice MCQ Questions and answers on Chemistry-GK Page-5 section-8

Section 1 Section 2 Section 3 Section 4 Section 5 Section 6 Section 7 Section 8 Section 9 Section 10 Section 11 Section 12

41.
Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpastes ?

A. Borax

B. Saltpetre

C. Hydrogen peroxide

D. Sodium chloride

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42.
Soap is prepared by boiling caustic soda with

A. Alcohol

B. Kerosene oil

C. Glycerine

D. Fats

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43.
'All the four quantum numbers of two electrons in an atom are not the same.' It is the law of –

A. Hund's rule of maximum multiplicity

B. Exclusion Principle of Pauli

C. Uncertainty Principle of Hiesenberg

D. Avogadro's Law

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44.
Which of the following is not a donor atom?

A. Phosphorus

B. Antimony

C. Arsenic

D. Aluminium

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45.
What happens when a chemical bond is formed ?

A. Energy is always absorbed

B. Energy in always released

C. More energy is released than is absorbed

D. Energy is neither released nor absorbed

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46.
Mark the compound which possess ionic, covalent and coordinate bonds.

A. NH₄Cl

B. SO₃

C. SO₂

D. H₂O

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47.
In ice, the number of hydrogen bonds per water molecule is

A. 1

B. 2

C. 4

D. 8

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48.
Of the following compounds of calcium, the one having highest covalent character is

A. CaF₂

B. CaCl₂

C. CaBr₂

D. Cal₃

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49.
Which one of the following species has the highest bond order, shortest bond length and maximum bond strength?

A. O₂

B. O⁺₂

C. O^-₂

D. O^-2₂

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50.
The number of hydrogen bonds between guanine and cytosine in DNA is

A. 2

B. 3

C. 4

D. 1

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Practice MCQ Questions and answers on Chemistry-GK

41. Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpastes ?

Answer & Solution

42. Soap is prepared by boiling caustic soda with

Answer & Solution

43. 'All the four quantum numbers of two electrons in an atom are not the same.' It is the law of –

Answer & Solution

44. Which of the following is not a donor atom?

Answer & Solution

45. What happens when a chemical bond is formed ?

Answer & Solution

46. Mark the compound which possess ionic, covalent and coordinate bonds.

Answer & Solution

47. In ice, the number of hydrogen bonds per water molecule is

Answer & Solution

48. Of the following compounds of calcium, the one having highest covalent character is

Answer & Solution

49. Which one of the following species has the highest bond order, shortest bond length and maximum bond strength?

Answer & Solution

50. The number of hydrogen bonds between guanine and cytosine in DNA is

Answer & Solution

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41.
Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpastes ?

42.
Soap is prepared by boiling caustic soda with

43.
'All the four quantum numbers of two electrons in an atom are not the same.' It is the law of –

44.
Which of the following is not a donor atom?

45.
What happens when a chemical bond is formed ?

46.
Mark the compound which possess ionic, covalent and coordinate bonds.

47.
In ice, the number of hydrogen bonds per water molecule is

48.
Of the following compounds of calcium, the one having highest covalent character is

49.
Which one of the following species has the highest bond order, shortest bond length and maximum bond strength?

50.
The number of hydrogen bonds between guanine and cytosine in DNA is