GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 119

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 119

1181). Duralumin contains

A). Mg and Al

B). Al and Au

C). Mn and Al

D). Zn and Al

Answer: Mg and Al

   

1182). Magnetic separation is used for the concentration of

A). Argentite

B). Galena

C). Haematite

D). Magnesite

Answer: Haematite

   

1183). Consider the following statements:

Assertion (A): Diamond is thermodynamically more stable than graphite at room temperature and ordinary pressure.

Reason (R): In diamond each carbon is tetrahedrally surrounded by four other carbon atoms and the tetrahedral are linked together into a three dimensional giant molecule.

Now select your answer according to the coding scheme given below:

A). Both (A) and (R) are true and (R) is the correct explanation of (A)

B). (A) is false and (R) is not correct explanation of (A)

C). (A) is true, but (R) is false

D). Both (A) and (R) are false

Answer: Both (A) and (R) are true and (R) is the correct explanation of (A)

   

1184). Match List I correct with List II and select your answer using the codes given below:

List I                                  List - II

a) Malathion                1) Rodenticide

b) Calomel                  2) Herbicide

c) Atrazine                  3) Fungicide

d) Nor-bromide           4) Insecticide

Codes:

a b c d

A). 4 3 2 1

B). 1 4 3 2

C). 3 2 1 4

D). 2 1 4 3

Answer: 4 3 2 1

   

1185). Which of the following is the correct pH range of blood of a healthy person?

A). 6.9 - 7.1

B). 7.0 - 8.0

C). 7.21 - 8.10

D). 7.35 - 7.45

Answer: 7.35 - 7.45

1186). The radio isotopes for blood circulation disorder or thyroid disorder are

A). radio sodium and radio iodine

B). radio sodium and radio phosphorus

C). radio iodine and radio phosphorus

D). radio iron and radio sodium

Answer: radio sodium and radio iodine

   

1187). 'Argentine' is chief ore/mineral of

A). silver

B). gold

C). mica

D). limestone

Answer: silver

   

1188). Consider the following:

l. CO burns with a blue flame.

ll. CO is good reducing agent and reduces alkali metal oxides.

Ill. CO is toxic because it forms a complex with haemoglobin in the blood and this complexes is 300 times more stable than oxyhaemoglobin.

IV. CO from complex with Ni at 50°C

and decomposition resulting complex gives pure Ni.

Which of the statements given above is/are correct?

A). All are correct

B). (ll) is not correct while (I), (III) and (IV) are correct

C). (I), (II) and (III) only are correct

D). (II), (III) and (IV) are correct

Answer: (ll) is not correct while (I), (III) and (IV) are correct

   

1189). The pH of a soft drink is 3 and that of milk is 7. How many times greater is the concentration of H3O^+ in soft drink than in milk?

A). 4 times

B). 40 times

C). 1000 times

D). 10,000 times

Answer: 10,000 times

   

1190). Nicotine upon-oxidation with chromic acid gives

A). Pyridine - 3 - Carboxylic acid

B). Pyridine - 2 - Carboxylic acid

C). Pyridine - 4 - Carboxylic acid

D). Pyridine - 2,3 - Dicarboxylic acid

Answer: Pyridine - 3 - Carboxylic acid