Rectified spirit contains alcohol about:
- (A) 70%
- (B) 80%
- (C) 85%
- (D) 95%
- (D) 95%
Glass is a good ________.
- (A) Conductor
- (B) Insulator
- (C) Semi-conductor
- (D) Inductor
- (B) Insulator
Amalgams are alloys which contain _______ as one of the contents.
- (A) Lead
- (B) Mercury
- (C) Lithium
- (D) Silver
- (B) Mercury
Which one of the following metals does not form amalgams?
- (A) Copper
- (B) Iron
- (C) Magnesium
- (D) Zinc
- (B) Iron
Which among the following alloys contain mercury as one of its constituents?
- (A) Solder
- (B) Copper amalgam
- (C) Alnico
- (D) Zinc amalgam
- (D) Zinc amalgam
Which of the following is an element?
- (A) Ruby
- (B) Sapphire
- (C) Emerald
- (D) Diamond
- (D) Diamond
Which of the following elements is not present abundantly in Earth’s crust?
- (A) Carbon
- (B) Silicon
- (C) Radium
- (D) Aluminum
- (C) Radium
What is silk?
- (A) Fat
- (B) Protein
- (C) Hydrocarbon
- (D) Carbohydrate
- (B) Protein
To decide the period of pre-historic is:
- (A) Radium dating
- (B) Carbon dating
- (C) Copper dating
- (D) Silver dating
- (B) Carbon dating
Which of the following material is very hard and very ductile?
- (A) Gold
- (B) Copper
- (C) Nichrome
- (D) Tungsten
- (C) Nichrome
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