___ is used for making chemical apparatus like beakers flasks etc.
1.Potash glass
2.Hard glass
3.Jena glass
4. Soda glass
Posted Date:-2021-07-02 06:54:25
_____ is used for making vinegar.
1.Tartaric acid
2.Malic acid
3.Oxalic acid
4.Acetic acid
Posted Date:-2021-07-02 06:54:25
2O represents two ......... of oxygen.
1.ions
2.electrons
3.atoms
4.molecules
Posted Date:-2021-07-02 06:54:25
Atomic bomb is based on which of the following principle?
1.Nuclear fusion
2. Nuclear fission
3.Natural radioactivity
4. All options are correct
Posted Date:-2021-07-02 06:54:25
Charge on proton is equal to the charge on ______.
1.Electron
2.Positron
3.Neutron
4.Alpha particle
Posted Date:-2021-07-02 06:54:25
Chemical formula for sulphurous acid is:
1.H2SO4
2.H2SO3
3.H3SO3
4.H3SO4
Posted Date:-2021-07-02 06:54:25
Chemical name of vinegar is
1.Onam
2.Pongal
3.Bihu
4.Hornbill
Posted Date:-2021-07-02 06:54:25
Find the similarity in the following : Carbon Silicon Boron Arsenic
1.All of them are gases
2.All of them are non-metals
3.All of them are metals
4.No similarity
Posted Date:-2021-07-02 06:54:25
Generally covalently bonded molecules ______. I. have high boiling and melting point as compare to ionically bonded molecules II. poor conductors of electricity III. have weak intermolecular force
1.Only I and II
2.Only I and III
3.Only II and III
4. All I II and III
Posted Date:-2021-07-02 06:54:25
Group 8A of the periodic table contains the
1.least reactive metals
2.most reactive nonmetals
3.most reactive metals
4.least reactive nonmetals
Posted Date:-2021-07-02 06:54:25
How many atoms are present in a (NH4)2SO4 molecule?
1.15
2.14
3.13
4.12
Posted Date:-2021-07-02 06:54:25
In arc welding Argon is used because of its
1.Low reactivity with metal
2.Ability to lower the melting point of the metal
3.High flammability
4.High calorific value
Posted Date:-2021-07-02 06:54:25
In Mendeleevs periodic table the properties of the elements are considered a periodic function of their:
1.Atomic mass
2.Ionization enthalpy
3.Atomic size
4.Atomic number
Posted Date:-2021-07-02 06:54:25
In the following reaction fill in the blank. Acid + Base ? _______ + Water
1.Carbon dioxide
2.Metal Oxide
3.Hydrogen Gas
4.Salt
Posted Date:-2021-07-02 06:54:25
Ionic compounds ______. I. have high boiling point II. have high melting point III. conduct electricity in solution
1.Only I and II
2.Only I and III
3.Only II and III
4.All I II and III
Posted Date:-2021-07-02 06:54:25
Saturated carbon compounds can form which types of chain structures? I. Straight chain II. Branched chain
1.Only I
2.Only II
3.Neither I nor II
4.Both I and II
Posted Date:-2021-07-02 06:54:25
The atoms of Germanium Arsenic Selenium and Bromine contain ...... shells.
1.3
2.7
3.5
4.4
Posted Date:-2021-07-02 06:54:25
The melting point of ice is ____ K.
1.253.16
2.263.16
3.273.16
4.283.16
Posted Date:-2021-07-02 06:54:25
What is the common name of Sodium Bicarborate?
1.Baking Soda
2.Washing Powder
3. Plaster of Paris
4.Fly Ash
Posted Date:-2021-07-02 06:54:25
What is the compound formed when Ag+ and Cl- combine?
1.Argon Chlorate
2.Argon Chloride
3.Silver Chloride
4.Silver Chlorate
Posted Date:-2021-07-02 06:54:25
What is the maximum number of states of matter?
1.Three
2.Four
3.Five
4.Variable
Posted Date:-2021-07-02 06:54:25
Which among the following has lowest electron affinity?
1.Fluorine
2.Chlorine
3.Bromine
4.Argon
Posted Date:-2021-07-02 06:54:25
Which among the following has the maximum density?
1.Water
2.Ice
3.Ethylene
4.Acetone
Posted Date:-2021-07-02 06:54:25
Which metal is liquid at room temperature?
1.Bromine
2.Chlorine
3.Mercury
4.Cesium
Posted Date:-2021-07-02 06:54:25
Which of the follow is the last element in Newlands Law of Octaves classification?
1.Rhodium
2.Radium
3.Iron
4.Thorium
Posted Date:-2021-07-02 06:54:25
Which of the following acts as best adsorbent?
1.Charcoal
2.Activated Charcoal
3.Activated Coconut Charcoal
4.Carbon black
Posted Date:-2021-07-02 06:54:25
Which of the following bonds are weakest in nature?
1.Single bond
2.Double bond
3.Triple bond
4. Hydrogen bond
Posted Date:-2021-07-02 06:54:25
Which of the following can be beaten and converted into thin sheets?
1.Zinc
2.Phosphorus
3.Sulphur
4.Oxygen
Posted Date:-2021-07-02 06:54:25
Which of the following elements has the lowest melting point?
1.Xenon
2.Iodine
3.Barium
4.Magnesium
Posted Date:-2021-07-02 06:54:25
Which of the following gas was released during Bhopal gas tragedy?
1. Methyl isocyanate
2.Sodium isothiocyanate
3.Nitrogen isothiocyanate
4. Potassium isothiocyanate
Posted Date:-2021-07-02 06:54:25
Which of the following induces souring of milk?
1. Acetic Acid
2.Citric Acid
3.Ascorbic Acid
4.Lactic Acid
Posted Date:-2021-07-02 06:54:25
Which of the following is a chemical formula of quicklime?
1.Ca2O
2.Ca2CO3
3.CaO2
4.CaO
Posted Date:-2021-07-02 06:54:25
Which of the following is used as anaesthetics?
1.N2
2.N2O
3.CH4
4.CO2
Posted Date:-2021-07-02 06:54:25