R4RIN – MCQs, Mock Tests | Chemistry Chemistry MCQ Questions Set-11

Kidney stones are composed of ______.

1. 9OL
2. Sodium Chloride
3. Magnesium Nitrate
4. Calcium Bicarbonate

✅ Correct Answer: 1

Which among the following is an example of solid sol?

1. Milk of magnesia
2. Foam
3. Coloured gemstones
4. Rubber

✅ Correct Answer: 3

During which change is energy absorbed?

1. Exothermic
2. Endothermic
3. Both A & B
4. Neither A nor B

✅ Correct Answer: 2

pH of the human blood is ______.

1. Slightly Acidic
2. Highly Acidic
3. Slightly Basic
4. Highly Basic

✅ Correct Answer: 3

Mass number is always equal to ______.

1. number of protons
2. number of neutrons
3. sum of number of protons and number of electrons
4. sum of number of protons and number of neutrons

✅ Correct Answer: 4

What is the natural source of Oxalic acid?

1. Tomato
2. Sour milk
3. Ant sting
4. Tamarind

✅ Correct Answer: 1

Rust is formed from iron and

1. Carbon
2. Oxygen
3. Hydrogen
4. All of the above

✅ Correct Answer: 2

What is the percentage of oxygen in Al2(SO4)3?

1. 57.70%
2. 56.10%
3. 53.10%
4. 52.60%

✅ Correct Answer: 2

Which element has the lowest ionization energy?

1. He
2. Ne
3. Fr
4. R

✅ Correct Answer: 3

If we take a small amount of washing soda and add approximately 1 mL of dilute hydrochloric acid to it, what will we observe?

1. only neutralisation reaction occurs, no gas is released
2. white-coloured precipitate is formed
3. CO2 gas comes out with brisk effervescence
4. H2 gas comes out with pop sound

✅ Correct Answer: 3

Which among the following is an endothermic reaction?

1. Respiration
2. Combustion
3. Sweating
4. Burning of natural gas

✅ Correct Answer: 3

Which of the following elements is used for vulcanizing rubber?

1. Sulphur
2. Chlorine
3. Bromine
4. Phosphorus

✅ Correct Answer: 1

Which of the following is a Synthetic rubber?

1. Leoprene
2. Monoprene
3. Neoprene
4. Isoprene

✅ Correct Answer: 3

What is the value of triple point (solid, liquid and gas) of Water?

1. 273.16 C
2. -273.16 K
3. 273.16 K
4. 0 C

✅ Correct Answer: 3

The passage of an electric current through a conducting liquid causes ___________.

1. Galvanisation
2. Evaporation
3. Physical Reaction
4. Chemical Reaction

✅ Correct Answer: 4

What is the general formula for a straight-chain alkane?

1. C2nH2n+3.
2. CnH2n+2
3. CnH2n
4. CnH3n+2.

✅ Correct Answer: 2

In case of a standard hydrogen electrode

1. absolute electrode potential is not zero
2. absolute electrode potential is zero
3. both absolute and standard electrode potential values are zero
4. electrode potential is zero only at 25 deg C

✅ Correct Answer: 1

The vast amount of sea weeds present in oceans may produce an endless source of

1. Methane
2. Ocean thermal energy
3. Sea wave energy
4. Nuclear energy

✅ Correct Answer: 1

What is a normal pH level in blood?

1. 7.35 - 7.45
2. 7.45 - 7.55
3. 7.6 - 7.7
4. 7 - 7.10

✅ Correct Answer: 1

The phosphorus cycle differs from the biogeochemical cycles in that

1. does not have atmospheric reservoir
2. uses water more
3. have atmospheric reservoir
4. None of the above

✅ Correct Answer: 1

Which compound is a saturated hydrocarbon?

1. Alkene
2. Alkane
3. Alkine
4. All of the above

✅ Correct Answer: 2

Sour taste of lemon is due to the presence of which of the following ?

1. Citric acid
2. Acetic acid
3. Oxalic acid
4. Formic acid

✅ Correct Answer: 1

Which one of the following is not a semiconductor?

1. Silicon
2. Germanium
3. Quartz
4. Gallium arsenide

✅ Correct Answer: 3

Which of the following inert gases is placed in period 4 of the periodic table?

1. Kr
2. Rn
3. Xe
4. Ar

✅ Correct Answer: 1

Which of the following is also known as Carbolic Acid?

1. Phenol
2. Hydroxide
3. Sulphuric Acid
4. Ethanol

✅ Correct Answer: 1

Which process usually requires water?

1. Physical weathering
2. Mass wasting
3. Chemical weathering
4. Erosion

✅ Correct Answer: 3

What is the product formed when sodium bicarbonate is heated strongly?

1. Sodium Carbonate
2. Sodium Hydroxide
3. Sodium Peroxide
4. Sodium Monoxide

✅ Correct Answer: 1

Which base is present in lime water?

1. Sodium hydroxide
2. Magnesium hydroxide
3. Calcium hydroxide
4. Ammonium hydroxide

✅ Correct Answer: 3

Dobereiner could identify only ......... triads from the elements known at that time.

1. 1
2. 3
3. 4
4. 2

✅ Correct Answer: 2

Hydrogenation process is associated with which of the following?

1. Rubber
2. Petroleum
3. Copper
4. Edible fats

✅ Correct Answer: 4

Which of the following can be beaten and converted into thin sheets?

1. Zinc
2. Phosphorus
3. Sulphur
4. Oxygen

✅ Correct Answer: 1

The hazardous component in most antifreeze is

1. Ethane alcohol
2. Ethylene Glycol
3. Ehtylene
4. Ethene

✅ Correct Answer: 2

Ozone is an ______ of oxygen.

1. Allotrope
2. Isotope
3. Isobar
4. Isotone

✅ Correct Answer: 1

Which molecule is used up in photosynthesis?

1. Water
2. Carbohydrates
3. Oxgen
4. Sugar

✅ Correct Answer: 1

Elements having same atomic numbers but different mass number are called ______.

1. isotones
2. Isotopes
3. isomopes
4. isobar

✅ Correct Answer: 2

The most reactive of the following metals is

1. Al
2. Ca
3. Ni
4. Pb

✅ Correct Answer: 2

Which base is present in milk of magnesia?

1. Magnesium hydroxide
2. Ammonium hydroxide
3. Sodium hydroxide
4. Calcium hydroxide

✅ Correct Answer: 1

The temperature at which a solid melts to become a liquid at the atmospheric pressure is called its ___________.

1. Crystallisation
2. Melting point
3. Evaporation
4. Galvanisation

✅ Correct Answer: 2

A/an ___ flame is produced when the oxygen supply is sufficient.

1. red
2. orange
3. blue
4. green

✅ Correct Answer: 3

What is the general formula of alkenes?

1. CnH2n
2. CnH2n+2
3. CnH2n-2
4. CnH2n-1

✅ Correct Answer: 1

Barium loses ____ electrons to achieve noble gas electron configuration.

1. 1
2. 2
3. 3
4. 4

✅ Correct Answer: 2

Which of the following is not a semiconductor?

1. CdS
2. NaCl
3. Si
4. Ge

✅ Correct Answer: 2

Which of the following is an inert gas most commonly found in light bulbs?

1. Argon
2. Hydrogen
3. Oxygen
4. Radon

✅ Correct Answer: 1

______ is made by mixing iron with carbon and metals like chromium, nickel and manganese.

1. Ship
2. Stainless Steel
3. Rust
4. Ozone

✅ Correct Answer: 2

The conversion of hard water into soft water by boiling or adding calcium hydroxide is called _______.

1. Baker's process
2. Temp's process
3. Clarke's process
4. Lake's process

✅ Correct Answer: 3

tomic number of which of the following elements is greater than that of Zinc

1. Copper
2. Iron
3. Chromium
4. Bromine

✅ Correct Answer: 4

In a compound the elements are always present in definite proportions by

1. mass
2. volume
3. size
4. No option is correct

✅ Correct Answer: 1

Calcium salts used as fertilizer is:

1. Calcium Carbide
2. Calcium Carbonate
3. Calcium Cyanide
4. Calcium Sulphate

✅ Correct Answer: 4

Which among the following is white phosphorus?

1. P1
2. P6
3. P4
4. P5

✅ Correct Answer: 3