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Aluminium window frames do not corrode away because the aluminium is: 

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Important Questions on Chemistry

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Which natural phenomenon conducts carbon dioxide fixation in plants?
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Human nails are made up of:

1. Pigment
2. Elastin
3. Albumin
4. Keratin

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Which of these is an essential component of most acids?
MEDIUM

Between small and large human intestine which one is longer?

1. Small intestine
2. Large intestine
3. Both are equal in length
4. Depends on male or female

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A particle in the medium completes 40 vibrations in 2.5 s. The frequency of the wave is ____:

MEDIUM

Which of the following is not a bleaching agent?

1. Sodium hypochlorite
2. Calcium hypochlorite
3. Hydrogen peroxide
4. Hydrogen sulphide

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 Which of the following metal is used in storage battery?
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How many moles of sulphuric acid are present in 25 gm?

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Which of these medical conditions is classified into Type-1 and Type-2?
MEDIUM

Which of the following non-metal conducts electricity?
(A) Lead
(B) Wood charcoal
(C) Coal
(D) Diamond

MEDIUM
Group _____ contain non–reactive gases(Noble Gases):
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Pressure is measured terms of:

1. Mass and Density

2. Work Done

3. Force and Area

4. Force and Distance

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The instrument used to regulate temperature to a particular degree is called:

1. Thermostat

2. Thermometer

3. Pyrometer

4. Thermocouple

MEDIUM
Which of the following tests cannot be used for identifying amino acids?