General Science - Mock Test 38

Question 371

Heavy water is?

A) ) Tritium oxide B) ) Water at 4 degree centigrade C) ) Deuterium oxide D) ) Rain water

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Question 372

If a ship moves from freshwater into seawater, it will?

A) ) sink completely B) ) remain unaffected C) ) sink a little bit D) ) rise a little higher

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Question 373

Hydrometer is an instrument?

A) ) For measuring sound in water B) ) To detect the presence of hydrogen in the atmosphere C) ) For measuring the specific gravity of liquids D) ) To detect the changes in atmospheric humidity

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Question 374

How many chromosomes pairs are there in a human body?

A) 19 B) ) 22 C) 23 D) 24

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Question 375

A tree's age can be found by?

A) counting the number of annual rings B) counting the number of branches C) measuring its girth D) measuring its height

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Question 376

Gobar gas contains mainly?

A) Methane B) Carbon Monoxide C) Carbon dioxide D) Butane

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Question 377

Glass is made from the mixture of?

A) Quartz and mica B) Sand and salt C) Sand and silicates D) Quartz and sand

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Question 378

A close bottle containing water at room temperature is taken to the Moon and than the lid is opene4⃣ The water will?

A) freeze B) boil C) decompose into oxygen and hydrogen D) The water will? 1⃣ freeze 2⃣ boil 3⃣ decompose into oxygen and hydrogen

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Question 379

A chronometer measures?

A) ) Colour contrast B) ) Time C) ) Sound waves D) ) Water waves

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Question 380

A chemical reaction that takes place with the evolution of heat is called a/an?

A) Exothermic reaction B) Reversible reaction C) Endothermic reaction D) Thermal reaction

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