Chemistry - MOST IMPORTANT UPSSSC PET Previous Year Questions

Calcium sulphate (CaSO₄)

Calcium oxychloride (CaOCl₂)

Sodium bicarbonate (NaHCO₃)

sodium chloride (NaCl)

$\displaystyle 60$%

$\displaystyle 75$%

$\displaystyle 80$%

$\displaystyle 100$%

Vitamin C

Vitamin A

Vitamin B

None of these

Citric acid

Acetic acid

Oxalic acid

Formic acid

Heart diseases

Diabetes

Cancer

Asthma

Methane

Nitrogen

Carbon dioxide

Chlorofluorocarbon (CFC)

Glucose

Cellulose

Sucrose

Fructose

None of these

Hydrogen

Carbon

Sulphur

None of these

Teflon

PVC

Black paint

Agricultural products

Electronic goods

Electrical goods

Jewellery

Methane

Argon

Carbon dioxide

Nitrous oxide

Increase in density in ozone layer

None of these

Decrease in thickness of ozone layer in stratosphere

Increase in the ozone layer in troposphere.

Rubber and cardboard

Glass and ceramics

Wood and paper

Metals and plastic

Sulfur dioxide (SO₂)

Carbon dioxide (CO₂)

Nitrogen (N₂)

Oxygen (O₂)

Gold

Silver

Mercury

Iron

Because it involves a change in state

Because heat is produced in this reaction

Because it produces light

Because it absorbs heat

Heat energy is produced

The temperature falls

The temperature remains the same

The temperature rises

Hydrogen gas (H₂)

Positively charged hydrogen ions (H+)

Neutral hydrogen atoms (H)

Negatively charged hydrogen ions (H-)

Methane and water vapour

Carbon dioxide and water vapour

Carbon dioxide and oxygen

Carbon monoxide and water

$\displaystyle 3.4$ x $\displaystyle 10$⁻⁸ ohm-meter

$\displaystyle 1.7$ x $\displaystyle 10$⁻⁸ ohm-meter

$\displaystyle 2$ x $\displaystyle 10$⁻² ohm-meter

$\displaystyle 1.7$ x $\displaystyle 10$⁻⁶ ohm-meter