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6.

Soaps are the sodium or potassium salts of higher fatty acids, containing a number of carbon atoms more than,


A) 10

B) 6

C) 8

D) 12



7.

Which mixture is used for respiration by deep-sea divers?


A) $Ne+O_{2}$

B) $Kr+O_{2}$

C) $Ar+O_{2}$

D) $He+O_{2}$



8.

The highest oxidation state in plutonium (At.no.=94) is


A) +6

B) +4

C) +5

D) +7



9.

The temperature of 32° C is equivalent to 


A) $89.6^{0}F$

B) $85.6^{0}F$

C) $70^{0}F$

D) $69^{0}F$



10.

Which of the following oxides can act both as an oxidising agent as well as a reducing agent?


A) $N_{2}O$

B) $SO_{2}$

C) $SO_{3}$

D) $P_{2}O_{5}$



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