Question

(iii) Silver amalgam is prepared by dissolving silver in
(a) molten copper (b) dilute nitric acid (c) mercury
(d) molten gold
(iv) Bronze is an alloy of :
(a) copper and tin
(b) copper and zinc (c) tin and zinc (d) copper, zinc and tin
(v) Zinc is used as :
(a) galvanisation
(b) negative electrode of dry cell
(c) both (a) and (b)
(d) none of these
(vi) The metal burns with a dazzling white flame and hence is used in fire works, such metal is
(a) calcium
(b) magnesium
(c) zinc
(d) sodium
(vii) Which of the following noble gases is used in filling weather observation balloons?
(a) Helium
(b) Neon
(c) Argon
(d) Krypton
(viii) A non-metal which is a good conductor of heat and electricity, is
(a) diamond
(b) sulphur
(c) graphite
(d) phosphorus
(ix) A glowing wooden splint on introducing in the jar of oxygen
(a) gives out smoke (b) bursts into flame (c) stops glowing (d) continues glowing
(x) Chemically tincture of iodine is
(a) iodine
(b) alcohol
(c) both (a) and (b) (d) none of these
riun ronson for your choice.​

Answer 1

Answer:

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