Chemistry: MCQ Test
25 questions · pick one option for each · submit when you finish to see your score and the correct answers.
Question 1 of 25
The name of C²H⁵OH according to IUPAC system is
- AEthanal
- BEthanol
- CPropanone
- DEthyne
Question 2 of 25
An unknown gas dissolves readily in water. Red litmus turns blue in aqueous solutions containing the gas. This gas also gives off white fumes when mixed with hydrogen chloride. This unknown gas is—
- ASO²
- BNO
- CNH³
- DCO
Question 3 of 25
Which gas do all acids release when they react with metals?
- Ahydrogen
- Bnitrogen
- Coxygen
- Dchlorine
Question 4 of 25
Which of the following solvents is used in dry washing of clothes?
- Achloroform
- BAcetone
- Cethyl alcohol
- Dcarbon tetrachloride
Question 5 of 25
It indicates the antiknock properties of a fuel.
- AGolden number
- BNatural numbers
- Coctane number
- DMach number
Question 6 of 25
Which one of the following chemical elements has the same oxidation state in all its compounds?
- ACarbon
- BFluorine
- Chydrogen
- Doxygen
Question 7 of 25
Urotropin is_
- Ahexamethylene diamine
- Bhexamethylene triamine
- Chexamethylene tetraamine
- Dhexamethylene pentaamine
Question 8 of 25
The chemical formula of Blue Vitriol is—
- ANa²S²O³5H²O
- BNa²CO³ 10H²O
- CNa²SO⁴ 10H₂O
- DCuSO⁴5H²O
Question 9 of 25
Which one of the following is the largest component of biogas?
- Acarbon dioxide
- Bmethane
- Chydrogen
- Dhydrogen sulfide
Question 10 of 25
Which of the following processes is not useful for purification of solid impurities?
- Adistillation
- Bsublimation
- CCrystallization
- DAll these
Question 11 of 25
The bond angle between carbon and hydrogen in the methane molecule is ____
- A105°
- B120°
- C180°
- D109° 28'
Question 12 of 25
The IUPAC name of 'Chloral' is_
- AEthanol
- Bmonochloro ethanol
- CDichloro ethanol
- Dtrichloroethanol
Question 13 of 25
Which of the following gases reduces the oxygen carrying capacity of the blood?
- Anitrous oxide
- Bcarbon monoxide
- Ccarbon dioxide
- Dnitric oxide
Question 14 of 25
Which of the following is present on the head of a matchstick?
- Aglue and glass powder
- Bwhite phosphorus
- CAntimony trisulfide
- Dpotassium chlorate
Question 15 of 25
Which gas is used in fire fighting?
- Ahelium
- BCO²
- CCO
- DO²
Question 16 of 25
What is the chemical name of the deadly poison 'cyanide'?
- Ahydrochloric acid
- Bsulfuric acid
- Cnitric acid
- Dmoussic acid
Question 17 of 25
What is the main component of petrol?
- APentane
- BOctane
- Cmethane
- DHexane
Question 18 of 25
Which of the following is not a variety of coal?
- ABitumen
- BLignite
- Cpeat
- DDolomite
Question 19 of 25
Consuming ethyl alcohol in large quantities has adverse effects.
- Aon the kidneys
- Bon the lever
- Con the heart
- Don the intestine
Question 20 of 25
In what should sodium metal be stored?
- Aalcohol
- Bkerosene oil
- CWater
- DHCL
Question 21 of 25
Who discovered 'neutron'?
- AJames Chadwick
- BErnest Rutherford
- CJ.J. Thomson
- DJohn Dalton
Question 22 of 25
Which of the following is an aldehyde?
- APropine
- BPropanone
- CPropanal
- DPropanol
Question 23 of 25
'Khaira' disease of paddy is caused due to the deficiency of which element?
- Anitrogen
- Bzinc
- Ccalcium
- DMagnesium
Question 24 of 25
Which of the following rays has the greatest penetrating power?
- Aof α-rays
- Bof β-rays
- Cof γ-rays
- DNone of these
Question 25 of 25
If ₉₂U²³⁸ decays to form ₉₁Pa²³⁴, how many α and β particles are emitted?
- A1α and 1β
- B2α and 2β
- C1α and 2β
- D2α and 1β