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Q.1) The first metal used by man was

(A) iron

(B) copper

(C) gold

(D) bronze

Q.2) The gas used for artificial ripening of green fruit is

(A) ethylene

(B) ethane

(C) carbon dioxide

(D) acetylene

Q.3) The nucleus of an atom consists of

(A) electrons and neutrons

(B) electrons and protons

(C) protons and neutrons

(D) All of the above

Q.4) The most electronegative element among the following is

(A) sodium

(B) bromine

(C) fluorine

(D) oxygen

Q.5) The metal used to recover copper from a solution of copper sulphate is

(A) Na

(B) Ag

(C) Hg

(D) Fe

Q.6) The metallurgical process in which a metal is obtained in a fused state is called

(A) smelting

(B) roasting

(C) calcinations

(D) froth floatation

Q.7) The most commonly used bleaching agent is

(A) alcohol

(B) carbon dioxide

(C) chlorine

(D) sodium chlorine

Q.8) The gas used in the manufacture of vanaspati from vegetable oil is

(A) hydrogen

(B) oxygen

(C) nitrogen

(D) carbon dioxide

Q.9) The nucleus of a hydrogen atom consists of

(A) 1 proton only

(B) 1 proton + 2 neutron

(C) 1 neutron only

(D) 1 electron only

Q.10) The heat required to raise the temperature of body by 1 K is called

(A) specific heat

(B) thermal capacity

(C) water equivalent

(D) None of the above

ਜੇਕਰ ਤੁਸੀ ਕਿਸੇ ਵੀ ਸਰਕਾਰੀ ਨੌਕਰੀ ਬਾਰੇ ਜਾਣਕਾਰੀ ਲੈਣਾ ਚਾਹੁੰਦੇ ਹੋ ਤਾ ਉੱਤੇ ਦਿੱਤੇ ਕੰਮੈਟ ਬਾਕਸ ਵਿੱਚ ਕੰਮੈਟ ਕਰ ਸਕਦੇ ਹੋ ਧੰਨਵਾਦ ਅਰਨ ਮਨੀ ਜੋਬਜ ਟੀਮ