A. High energy electron beam
B. – particle
C. X-rays
D. All of the above
✅ The correct answer is option D.
Chemistry MCQs
Molten NaCl conducts electricity due to the presence of
A. Free Electrons
B. Free molecules
C. Free ions
D. Atoms of Na and Cl
✅ The correct answer is option C.
Formalin is _______ % solution of formaldehyde in water
A. 10%
B. 20%
C. 40%
D. 60%
✅ The correct answer is option C.
The number of peaks obtained in mass spectrometry shows
A. Relative abundance
B. The average mass of the element
C. Number of isotopes
D. Relative isotopic mass
✅ The correct answer is option C.
Elements in the same vertical group of the periodic table have same
A. Number of valence electrons
B. Atomic number
C. Atomic mass
D. Atomic volume
✅ The correct answer is option A.
Which of the following aldehydes shows rapid reaction with sodium nitroprusside?
A. Formaldehyde
B. Acetaldehyde
C. Benzaldehyde
D. Acetone
✅ The correct answer is option D.
The empirical formula of chloroform is
A. CH2 C12
B. CH3C1
C. CC14
D. CHC13
✅ The correct answer is option D.
An element having a low value of ionization energy and low value of electron affinity is likely to belong to
A. Group IA
B. Group IB
C. Group VIIA
D. Group VIII
✅ The correct answer is option A.
Acetone reacts with HCN to form a cyanohydrin. It is an example of
A. Electrophilic Addition
B. Electrophilic substitution
C. Nucleophilic addition
D. Nucleophilic substitution
✅ The correct answer is option C.
Which one is true about isotope?
A. Same number of neutrons
B. Same mass number
C. Same physical properties
D. Same chemical properties
✅ The correct answer is option D.