Chemistry - Online Test
Q1.
A solution of Ni()2 is electrolyzed between platinum electrodes using a current of 5 amperes for 20 minutes. What mass of Ni is deposited at the cathode?
Answer : Option D
Explaination / Solution:
Q2. The hybridization of central atom of a molecule would lead to
Answer : Option D
Explaination / Solution:
In sp3d2 Hybridization one s, three p and two d-orbitals get hybridized to form six sp3d2 hybrid orbitals which adopt octahedral arrangement as given in image below
Q3. Anisole reacts with a mixture of concentrated sulphuric and nitric acids to yield a mixture of ortho and paranitroanisole
Q4. Radium salts are used in
Answer : Option D
Explaination / Solution:
Ra salts are used in the treatment of Cancer.
Q5. Geometrical isomers and Optical isomers are:
Answer : Option C
Explaination / Solution:
They are stereoisomers as they differ in the orientation of atoms in space.
Q6. The minimum amount of energy required by the reacting molecules at the time of collisions in order to produce effective collisions is called
Answer : Option B
Explaination / Solution:
The minimum amount of energy required by the reacting molecules at the time of collisions in order to produce effective collisions is called threshold energy.
Q7. Which of the following methods is used for sol destruction?
Answer : Option A
Explaination / Solution:
Electrolyte makes the colloid destroy.
Q8.
Pay load is defined as the difference between the mass of displaced air and the mass of the balloon. Calculate the pay load when a balloon of radius 10 m, mass 100 kg is filled with helium at 1.66 bar at. (Density of air = 1.2 kg m-3 and R = 0.083 bar .
Answer : Option B
Explaination / Solution:
Volume of balloon,V=4/3(3.14) =4187 Mass of displaced air,m=V × δ =4187 x 1.2=5024.4 kg Temperature,T=300 K Moles of gas present,n=PV/RT=279.1 × 103 moles Mass of helium=279.1 ×103 x 4=116.4 kg Mass of filled balloon,m'=100+1116.4=1216.4 kg Payload=m-m'=3811.1 kg
Q9. Nucleotides are joined together by
Answer : Option D
Explaination / Solution:
Nucleotides are together by phosphodiester linkage.
Q10.
Which of the following compounds is aromatic alcohol?
Answer : Option B
Explaination / Solution:
Compound (A) i.e., phenol and compound (D) i.e. a derivative of phenol cannot be considered as aromatic alcohol. As phenol is also known as, carbolic acid cannot be considered as aromatic alcohol.
Benzyl alcohol and substituted benzyl alcohol are aromatic alcohol.
