Which one of the following is the heaviest metal?
- (A) Iron
- (B) Platinum
- (C) Osmium
- (D) Lead
- (C) Osmium
Which one of the following is brittle?
- (A) Sodium
- (B) Aluminum
- (C) Selenium
- (D) Magnesium
- (A) Sodium
Which one of the following metal burns with a brick red flame?
- (A) Sodium
- (B) Iron
- (C) Calcium
- (D) Magnesium
- (C) Calcium
A metal which is soft and can be cut with knife is:
- (A) Iron
- (B) Sodium
- (C) Magnesium
- (D) Calcium
- (B) Sodium
The most reactive metal is:
- (A) Gold
- (B) Iron
- (C) Sodium
- (D) Cesium
- (D) Cesium
The least reactive metal is:
- (A) Potassium
- (B) Copper
- (C) Magnesium
- (D) Calcium
- (B) Copper
The substances formed during the chemical reaction are called:
- (A) Products
- (B) Reactants
- (C) Radicals
- (D) Elements
- (A) Products
The color of Iodine is:
- (A) Black
- (B) Yellow
- (C) Purple
- (D) Green
- (C) Purple
Which of the following gases is used in cigarette lighters?
- (A) Butane
- (B) Radon
- (C) Methane
- (D) Propane
- (A) Butane
In laboratory urea is prepared by:
- (A) Wohler
- (B) Dalton
- (C) Berzelius
- (D) Rutherford
- (A) Wohler
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