Which element is missing in given series ?
1.Oxygen
2.Nitrogen
3.Phosphorous
4.Sulphur
Posted Date:-2022-01-11 10:36:39
An element 'E' loses electron and becomes an ion. Name the process and ion :
1.Oxidation, cation
2.Oxidation, anion
3.Reduction, cation
4.Reduction, anion
Posted Date:-2022-01-11 09:22:55
An example of hydracid is _____________.
1. Hydrochloric acid
2.Sulphuric acid
3.Nitric acid
4.Acetic acid
Posted Date:-2022-01-11 10:22:53
Bases furnish..ions in solutions.
1.H+
2.OH-
3.Both (1) and (2)
4.None of these
Posted Date:-2022-01-11 10:14:42
Choose the hydroxide which is insoluble in excess of ammonium hydroxide ?
1.Calcium hydroxide
2.Ferric hydroxide
3.Copper hydroxide
4.Zinc hydroxide
Posted Date:-2022-01-11 10:15:52
Four solutions are taken. A copper strip is added to these ? The colour of which of the following will turn blue?
1.KNO
2.AgNOs
3.3. Zn(NO)
4.Ca(NO)2
Posted Date:-2022-01-11 10:30:41
How many periods and groups are there in Modern Periodic Table ?
1.8 groups and 7 periods
2.7 periods and 18 groups
3.7 groups and 18 periods
4.7 groups and 15 periods
Posted Date:-2022-01-11 08:48:23
How the ionisation energy of the elements changes on moving top to bottom in the group?
1.increases
2.decreases
3.remains same
4.Zero
Posted Date:-2022-01-11 09:02:04
Identify the odd one :
1.Methane
2.HC
3.NaCl
4.Nitrogern
Posted Date:-2022-01-11 09:11:49
If the vapour density of a gas is 15, its relative molecular mass will be _____________
1.30
2.7.5
3.zero
4.can't be determined
Posted Date:-2022-01-11 10:32:51
Modern periodic table is based on which of the following property of elements ?
1.Atomic number
2.Atomic mass
3.Electronegativity
4.Electron affinity
Posted Date:-2022-01-11 08:40:36
The amount of energy released when an electron is added to the outermost shell of an isolated gaseous neutral atom is called its :
1.Atomic size
2.lonisation potential
3.Electron affinity
4.Electronegativity
Posted Date:-2022-01-11 09:21:46
The correct relationship of molecular formula and empirical formula is Molecular formula x empirical formula________________.
1.Empirical formula = n * molecular formula
2.Molecular formula x empirical formula
3.n-Molecular formula x empirical formula
4.Molecular formula n/empirical formula
Posted Date:-2022-01-11 08:45:21
The kind of particles present in carbonic acid are ____________.
1.Ions
2.Molecules
3.Both (1) and (2)
4.None of these
Posted Date:-2022-01-11 10:19:10
To which group does missing elements belongs ?
1.15
2.16
3.17
4.18
Posted Date:-2022-01-11 10:38:52
To which period these elements belong ?
1.First
2.Second
3.Third
4.Fourth
Posted Date:-2022-01-11 10:35:34
What happens when ammonia solution is added first drop-wise and then in excess to zinc sulphate?
1.A reddish brown ppt. is formed which is insoluble in excess of alkali.
2.Dirty green ppt. is formed which is insoluble in excess of alkali.
3.A gelatinous white ppt. is formed which is soluble in excess of alkali.
4.No ppt. will be formed even in excess of alkali.
Posted Date:-2022-01-11 10:31:45
What happens when ammonium hydroxide solution is added to calcium salt ?
1.A white ppt is formed.
2.Ppt. formed is soluble in excess of alkali.
3.A colourless solution is formed.
4.No ppt. is formed.
Posted Date:-2022-01-11 08:56:05
What is the colour of ppt. formed when sodium hydroxide solution is added to calcium salt ?
1.Green
2.White
3.Brown
4.Red
Posted Date:-2022-01-11 08:43:18
What is the colour of the ppt. formed when sodium hydroxide solution is added to ferric salt ?
1.Dirty green
2.white
3.Brown
4.Reddish brown
Posted Date:-2022-01-11 08:53:10
What is the correct order of atomic size ?
1.Mg <Cl < Na < 5
2.Cl<S< Mg < Na
3.S<Cl< Mg < Na
4.Mg< Na <S <C
Posted Date:-2022-01-11 09:00:35
What is the correct relationship between vapour density and molecular mass ?
1.Relative molecular mass Vapour density /2
2.vapor density = 2x Relative molecular mass
3.Relative molecular mass = 2x Vapour density
4.vapor density = Relative molecular mass
Posted Date:-2022-01-11 09:07:31
What is valency of group 18 elements ?
1.Zero
2.One
3.Two
4.Three
Posted Date:-2022-01-11 10:40:51
Which element belongs to group 18 and what is that group elements called ?
1. O, chalcogens
2.Li, alkali metals
3.F ,halogens
4.Ne, Inert gases
Posted Date:-2022-01-11 10:40:02
Which formula denotes the actual number of different elements present in one molecule of compound ?
1.Molecular formula
2.Empirical formula
3. Empirical formula mass
4.Percentage
Posted Date:-2022-01-11 08:57:52
Which formula denotes the simplest positive integer ratio of atoms present in a compound ?
1.Molecular formula
2.Empirical formula
3.Empirical formula mass
4.Percentage
Posted Date:-2022-01-11 10:17:29
Which of the following anion can be discharged with maximum ease ?
1.Sulphate ion
2.Iodide ion
3.Hydroxyl ion
4.Nitrate ion
Posted Date:-2022-01-11 08:59:01
Which of the following contains molecules only ?
1.Sugar
2.NaOH
3.HC
4.Carbonic acid
Posted Date:-2022-01-11 10:20:05
Which of the following elements has highest ionisation energy
1.Li
2.Na
3.K
4.Cs
Posted Date:-2022-01-11 09:03:51
Which of the following is a coloured lon ?
1.Nickel
2.Lead
3.Zinc
4.Chloride
Posted Date:-2022-01-11 10:27:50
Which of the following is a mineral acid ?
1.Oxalic acid
2. Sulphuric acid
3.Malic acid
4.Acetic acid
Posted Date:-2022-01-11 08:41:28
Which of the following is a not a strong acid ?
1.Hydrochloric acid
2.Sulphuric acid
3.Nitric acid
4.Acetic acid
Posted Date:-2022-01-11 10:13:47
Which of the following is not an oxyacid ?
1.Hydrochloric acid
2.Sulphuric acid
3.Nitric acid
4.Acetic acid
Posted Date:-2022-01-11 10:21:50
Which of the following is true for electrolysis of copper sulphate solution Anode acts as electron donor.
1.Cathode acts as electron acceptor.
2.Anode acts as electron donor.
3.Copper is deposited at cathode.
4.Sulphate ions migrate towards anode.
Posted Date:-2022-01-11 08:47:33
Which of the following statement is not true regarding acids ?
1.They have a sour taste.
2.They are good conductors of electricity
3.They turn red litmus to blue.
4.They are corrosive in nature.
Posted Date:-2022-01-11 10:26:43
Which of the following statement is not true regarding ionic or electrovalent bond ?
1.These are hard and brittle solids.
2.They have high density.
3.They are insoluble in water.
4.They have high melting and boiling points
Posted Date:-2022-01-11 08:50:13
Which of the ions can be discharged with maximum difficulty ?
1.Cu
2.Ag
3.Pb
4.K
Posted Date:-2022-01-11 09:04:56
Which type of bond is formed between a metal and a non-metal ?
1.Covalent bond
2. Coordinate covalent bond
3.Ionic or electrovalent bond
4.No bonding
Posted Date:-2022-01-11 08:42:23
Which type of bond is present in chlorine molecule ?
1.Single covalent bond
2.Double covalent bond
3.Triple covalent bond
4.Tonic bond
Posted Date:-2022-01-11 09:11:04
Which type of bonding is present in ammonium ion ?
1.Covalent bond
2.Coordinate bond
3.Ionic or electrovalent bond
4.No bonding
Posted Date:-2022-01-11 08:51:29