A compound formed from an acid by the replacement of the hydrogen in the acid by a metal is called:
1.Base
2. Salt
3.Concentrated Acid
4. Alkali
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A negatively charged particle found in the atoms of all elements is called:
1.Proton
2.Electron
3.Neutron
4. Ion
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A neutral particle found in the nucleus of an atom is called:
1.Electron
2.Nucleus
3.Proton
4.Neutron
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A positively charged particle found in the atoms of all elements is called:
1. Ion
2.Electron
3. Proton
4.Neutron
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A small positively charged part at the centre of an atom is called:
1.Nucleus
2. Neutron
3.Electron
4. Proton
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An unsaturated hydrocarbon in which two carbon atoms are connected by a triple bond is called:
1.Alkynes
2.Haloalkanes
3.Alkenes
4.Ketones
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Aromatic hydrocarbons are also known as ........... ?
1.Acetaldehyde
2.Butyne
3. Arenes
4.Arines
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At present how many elements are known to us?
1.118
2.119
3.120
4.117
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Atoms of the same element having the same atomic number but different mass number are called:
1.Radioactive isotopes
2.Isobars
3.Valence Electrons
4.Isotopes
Posted Date:-2021-03-07 09:39:46
 A positively and negatively charged atom or group of atoms is called:
1.Nucleus
2. Ion
3.Compound
4.Molecule
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 Name a metal oxide which is acidic and basic in nature?
1.Calcium Oxide
2.Iron Oxide
3.Amphoteric Oxide
4.Sulphur dioxide
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 Which of the following statement is not true about metals?
1.Metals are heavy and produce sound when hit with an object.
2.Mercury metal is solid at room temperature.
3.Metals have high densities.
4.Metals can be converted into thin sheets.
Posted Date:-2021-03-07 09:39:46
 Why alkanes are known as saturated hydrocarbon?
1. It consists of triple bond.
2.It consists of double bond.
3.It consists of single bond.
4.None of the above
Posted Date:-2021-03-07 09:39:46
 Why Aluminium is used for making cooking utensils?
1. It is good conductor of heat.
2.It is sonorous
3.It is malleable
4.None of the above.
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Compounds that contain carbon are called:
1.Organic compound
2.Ionic compound
3.Alkynes
4.Molecular compound
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In water alkanes are .......... ?
1.Soluble
2.Insoluble
3. Bitter in taste
4.Sweet in taste
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In which hydrocarbon all the four valencies of carbon are linked together with single bond?
1. Alkanes
2.Alkenes
3.Alkynes
4.None of the above
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An electrically neutral group of two or more atoms chemically bonded together is called:
1.Molecule
2.Ion
3.Element
4.Compound
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Name a hydrocarbon which is a main component of natural gas?
1.Methyl
2.Methane
3.Ethyl
4.Methanol
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Name a metal which is used in making airplanes?
1.Copper
2. Zinc
3. Iron
4.Aluminium
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Name an open chain hydrocarbon which is odourless?
1.Aldehydes
2.Aromatic
3.Aliphatic
4.Acetate
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Name an organic compound in which RCOOCOR is a functional group?
1.Ester
2.Acid anhydride
3.Dimethyl ether
4.Aliphatic hydrocarbon
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Name the property of metal in which it can be drawn into thin wires?
1.Sonorous
2.Ductility
3.Malleability
4.Conductivity
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Other than mercury which other metal is liquid at room temperature?
1.Sodium
2.Lithium
3.Gallium
4.Caesium
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Ringing bells in the temples are made up of:
1. Non-Metals
2. Metalloids
3.Metals
4.None of the above
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The atomic number of four elements P, Q, R, S are 6, 8, 10 and 12 respectively. The two elements which can react to form ionic compounds are:
1.P and S
2.Q and R
3.P and R
4.Q and S
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The chemical bond formed by the sharing of electrons between two atoms is known as:
1.Ionic bond
2.Ionic bond
3.Covalent bond
4.Single covalent bond
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The organic compounds having the same molecular formula but different structures are called:
1.Atoms
2.Isomers
3.Homologous series
4.Haloalkanes
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The scale on which the strength of acid solutions as well as basic solutions could be represented by making use of hydrogen ion concentrations in them is called:
1. Balance scale
2.Platform scale
3.Pan scale
4.Pan scale
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The solution of one of the following compounds will conduct electricity. This compound is:
1.CCl4
2.HCl
3.CaCl2
4.CH3Cl
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The study of heat flow is called:
1.Combustion
2.Calorimetry
3.Diffusion
4.Electrolysis
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Those chemical substances which have a bitter taste are:
1. Acid
2. Bases
3.Salt
4.Concentrated Acids
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Those chemical substances which have a sour taste are:
1.Salt
2. Acid
3.Bases
4.None of the above
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Those reactions in which two or more substances combine to form a single substance is called:
1.Combination reaction
2.Displacement reaction
3.Decomposition reaction
4. Double displacement reaction
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What are the different physical forms in which an element can exist called?
1. Alkane
2.Alloy
3.Amine
4.Allotropes
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What is a homogeneous mixture of two or more metals called?
1.Salt
2.Alloy
3.Alkali
4.Acid
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What is an unsaturated hydrocarbon in which the two carbon atoms are connected by a double bond called?
1.Alkanes
2.Alkenes
3.Alkynes
4. Ionic bond
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What is the chemical bond formed by the transfer of electrons from one atom to another is called?
1.Single covalent bond
2. Ionic bond
3.Double covalent bond
4.Triple covalent bond
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What is the general formula of alkenes?
1.CnH2n
2.CnH2n-2
3.CnH2n+2
4.CnH2n+OH
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What is the mixing of air into a liquid or solid called?
1.Aeration
2.Aldehyde
3.Actinides
4.Allotropy
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What is the old name of alkenes?
1.Olefins
2.Paraffin
3.Acetylene
4.None of the above
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What is the part of the solution that dissolves the solute called?
1. Solvent
2. Sol
3.Salt
4.None of the above
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What is the process called when a compound combines with oxygen gas to form water, heat and carbon dioxide?
1.Electrolysis
2.Combustion
3.Diffusion
4. Calorimetry
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What is the substance that has an unstable nucleus that can fall apart called?
1.Organic compound
2.Radioactive
3.Nuclear fission
4.Nuclear fusion
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When a gas moves through an opening into a chamber that contains no pressure, it is called:
1.Effusion
2.Diffusion
3.Combustion
4.Osmosis
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When a substance loses electrons, it is called:
1.Corrosion
2.Rust
3.Oxidation
4.Osmosis
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Which compound is used for making perfumes and dyes?
1. EthylÂ
2.Ethyl acetate
3.Ethanoate
4.Ethanone
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Which of the following metal can be cut down with the help of knife?
1.Sodium
2.Potassium
3.Gallium
4.All of the above
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Which of the following statement is true about ionic compounds?
1.Ionic compounds conduct electricity when dissolved in water.
2.Ionic compounds are not soluble in water.
3. Ionic compounds are crystalline solids.
4.Only A and C
Posted Date:-2021-03-07 09:39:46