Quiz 23- Chemistry-General Science: General Knowledge Question & Answers

221 Q) "The role of the calcinations in metallurgical process is "

(a) to remove moisture

(b) to decompose carbonate into oxide

(c) to remove organic matter

(d) All of the above

Show Answer

D

222 Q) "Colligative properties are properties of solutions that depend on "

(a)the mass of the molecules present in the solution

(b)the size of the molecules present in the solution.

(c)the number of ions/molecules in a given amount of solvent

(d)None of the above

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C

223 Q) "Which of the following statements in connection with the properties of water is/are correct? 

1 .Water has higher specific heat in comparison with other liquid. 

2.Water has no dipole moment. 

3.Water has low heat of vaporisation. 

Select the correct answer using the codes given below"

(a) Only 1

(b) 2 and 3

(c) 1 and 3

(d) Only 3

Show Answer

A

224 Q) Which one among the following is the commonest amino acid in nature?

(a) Glycine

(b) Alanine

(c) Phenylalanine

(d) Aspartic acid

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B

225 Q) The melting points and boiling points of the transition elements are higher than the corresponding s-block elements. Then which one among the following statements is correct?

(a) Transition elements have smaller size

(b) Presence of one or more unpaired electrons contributing to higher atomic forces on account of covalent bond

(c) Presence of strong metallic bond due to small size and higher ionisation energy

(d) Presence of vacant d-orbital

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B

226 Q) Milk, Mayonnaise are the examples of

(a) sol

(b) gel

(c) emulsion

(d) foam

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C

227 Q) Which one among the following is not a greenhouse gas?.

(a)Methane

(b)Ozone

(c)Chlorofluorocarbon

(d)Sulphur dioxide

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B

228 Q) "Which one among the following statements is correct? "

(a) All bases are alkalis

(b) None of the basis is alkali

(c) There are no more bases except the alkalis

(d) All alkalis are bases but all bases are not alkalis

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D

229 Q) "Consider the following statements 

I.Hardness of water depends upon its soap consuming power. 

II.Temporary hardness is due to bicarbonates of magnesium and calcium. 

III.Permanent hardness of water is due to sulphate and/or chloride of calcium and magnesium.

IV. Permanent hardness can be removed by boiling. 

Which of the statements given above are correct?"

(a) I, II, III and IV

(b) I, II and III

(c)II and III

(d) III and IV

Show Answer

A

230 Q) "Which of the following statements regarding the property of hard water is/are correct?. 

1.Temporary hardness of water is due to the presence of soluble magnesium and calcium hydrogen carbonate. 

2.Temporary hardness of water can be removed by boiling. 

3.Calgon's method is applied to remove temporary hardness of water. 

4.Permanent hardness of water is removed by Clark’s method. 

Select the correct answer using the codes given below"

(a) 1 and 2

(b) 1, 2 and 3

(c) 3 and 4

(d) Only 2

Show Answer

B