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Chemistry Questions Answers
The volume of 1 N sodium hydroxide required to neutralise 10 ml of 0.5N hydrochloric acid will be
5 ml.
10 ml.
15 ml.
20 ml.
5 ml.
A mixture of ethyl alcohol and water can be separated into individual components by
separation of layers in a separatory funnel
crystallisation
chromatography
fractional distillation
fractional distillation
In order to prevent corrosion, iron pipes are often coated with a layer of zinc. This process is known as
Electroplating
Annealing
Galvanisation
Vulcanisation
Galvanisation
Positive rays in a discharge tube with perforated cathode travel
parallel to the anode
parallel to the cathode
from cathode to anode
from anode to cathode
from anode to cathode
In 1886, the German scientist Eugen Goldstein conducted an experiment unveiling anode rays, composed of positively charged particles that possess discernible weight. These rays traverse in a linear path from the anode to the cathode.
Which one of the following has the lowest percentage of carbon?
Mild steel
Soft steel
Hard steel
Wrought iron
Wrought iron
Critical criteria for the location of an aluminium plant in India are the availability of bauxite and
coal
electricity
labour
ready market
electricity
The reaction of zinc with dilute sulphuric acid produces
hydrogen
sulphur dioxide
sulphur trioxide
hydrogen sulphide
hydrogen
In a spontaneous process —
entropy change is positive
entropy change is negative
there is no change in entropy
entropy and free energy changes are positive
entropy change is positive
If the temperature of a semiconductor is raised, its resistivity will
increase
decrease
remain constant
reduce to zero
decrease
Consider the following statements
I. Alginic acid, which is used in making smooth ice creams, is extracted from bryophyte.
II. Ephedrine, a drug used for the relief from asthma, is derived from a gymnosperm
Which of these statements is/are correct?
I only
II only
Both I and II
Neither I nor II
Both I and II