A chloride which forms a precipitate that is soluble in excess of anmmonium hydroxide is
1.Calcium chloride
2.Ferrous chloride
3.Ferric chloride
4.Copper chloride
A compound which liberates reddish brown gas around the anode during electrolysis in its molten state :
1.Sodium chloride
2.Copper
3.Copper (II) sulphate
4.Lead (II) Bromide
A polar covalent bond will be formed in which one of these pair of atoms
1.HF
2.H
3.Cl
4.O2
A solution of the compound which gives a dirty green precipitate with sodium hydroxide.
1.Ammonium sulphate
2.Lead carbonate
3.Ferrous sulphate
4.Chlorine
Alkalis are :
1.acids, which are soluble in water
2.acids, which are insoluble in water
3.bases, which are insoluble in water
4.acids, which are insoluble in water
Aluminum has a tendency to lose :
1.2 electrons
2.1 electron
3.3 electrons
4.4 electrons
An acid which is used in soda wash and in aerated drinks is __________.
1.Citric acid
2.Carbonic acid
3.Acetic acid
4.Boric acid
An element having atomic number 17 and belongs to halogens is _____________.
1.Li
2.F
3.K
4.Cl
An element having atomic number 19 and belongs to Alkali metals is ___________.
1.Li
2.F
3.K
4.Cl
An element having electronic configuration 2, 8, 18, 3 belongs to which group of the Modern Periodic Table?
1.13 group
2.3rd group
3.18th group
4.15th group
An organic compound contains carbon, hydrogen and oxygen. Its elemental analysis gave Carbon 38.7% and Hydrogen 9.67%. The empirical formula of the compound would be
1.CH3O
2.CH2O
3.CHO
4.CH4O
Anhydrous iron(III) chloride is prepared by :
1.Direct combination
2.Simple displacement
3.Decomposition
4.Neutralization
Arrange the following as per instruction given in the brackets Cl, E, Br I (Increasing order of electron affinity)
1.Br <I<F <Cl
2.I< Br < Cl <F
3.Br< Cl<I<F
4.F<Cl< Br<1
Arrange the following as per instruction given in the brackets: Cs Na Li R ( increase order or metallic character)
1. Li< Na < K < Rb< Cs
2.Li< Na <Cs < SK <Rb
3. K< Rb< Cs <Li < Na
4.Cs<Li< Na < K < Rb
During electrolysis of NaCl, the gas discharged at the anode is :
1.Chlorine
2.Oxygen
3.Hydrogen
4.None of these
How many valence electrons are Mg?
1.1
2.2
3.3
4.4
How many water molecules does hydrated calcium sulphate contain ?
1.5
2.10
3.7
4.2
If element X forms a chloride with the formula XCl3, then X would most likely belong to the same group of the Moderm Periodic Table as :
1.Na
2.Br
3.Al
4.Mg
ldentify the molecule with a single covalent bond.
1.CO2
2.CO
3.C12
4.N2
Lithium chloride is formed by transfer of electrons, which elements is getting oxidised in the process of formation ?
1.Lithium
2.Chlorine
3.Both1 and 2
4.None of these
Magnesium hydroxide is _____________.
1.Monoacidic alkali
2.Diacidic alkali
3.Triacidic alkali
4.All of these
Na CO,10H,O is:
1.washing soda
2.baking soda
3. bleaching powder
4.tartaric acid
Name an element, which reacts vigorously with water.
1.Argon
2.Boron
3.Calcium
4.Uranium
Name the transition metal.
1.Chromium
2.Sulphur
3.Calcium
4.Oxygen
Name two elements in same group of periode Table
1.Oxygen and Uranium
2.Oxygen and sulphur
3.Calcium and Hydrogen
4.Cromium and Rubidium
Naphthalene contains 93.75% C and the rest hydrogen. Molecular mass of naphthalene is 18 Find its empirical formula.
1.C5H2
2.C6H4
3.C5H10
4.C5H10
Relation between vapour density and molecular weight
1.Molecular weight = 2/ Vapour density
2.Molecular weight= 2x Vapour density
3.Molecular weight x 2= Vapour density
4.None of these
Sodium carbonate is a basic salt because it is a salt at a:
1.strong acid and strong base
2.weak acid and weak base
3.strong acid and weak base
4. Weak acid and strong base
The electronic configuration of Mg is ___________.
1.2,8,1
2.8,2
3.2,8,2
4.2,8
The empirical formula and molecular mass of a compound are CHO and 180g respectively. What will be the molecular formula of the compound ?
1.CHO
2.CH2O
3.CHO
4.CH2O
The oxide and hydroxide of which metal is amphoteric :
1.Zinc
2.Copper
3.Iron
4.Manganese
The salt which on hydrolysis forms acid is _______________.
1. Iron chloride
2.Aluminium acetate
3.Sodium chloride
4.All the above
The vessel in which electrolysis of lead bromide is carried out is :
1.Clay crucible
2.Glass vessel
3.Silica crucible
4.Aluminium vessel
Valency of aluminium is:
1.2
2.3
3.4
4.5
What is the colour when methyl orange is added to Sulphuric acid ?
1.Pink
2.Red
3.Blue
4.Colourless
When fused lead bromide is electrolysed we observe:
1.a silver grey deposit at anode and a reddish brown deposit at cathode
2.a silver grey deposit at cathode and a reddish brown deposit at anode
3.a silver grey deposit at cathode and reddish brown fumes at anode
4.silver grey fumes at anode and reddish brown fumes at cathode.
Which element form very corrosive acid ?
1.Chromic acid produced chromium
2.Oxalic acid produced by oxygen
3.Calcium carbonate acid produce by acid
4.Ferric oxide produced by iron
Which soln. becomes a deep/inky blue colour when excess of ammonium hydroxide is added to it.
1.Copper nitrate
2.Iron [I] sulphate
3.Iron [III] chloride
4. Lead nitrate
Which type of bond is present in carbon tetrachloride?
1.lonic bond
2.Covalent bond
3.Coordinate bond
4.None of these
Write the name of a non-metal of group 15.
1.Nitrogen
2.Calcium
3.Phosphorous
4.None of these