Hydrogen & S-Block
40 Questions MCQ Test Chemistry Mock Test Series for JEE | Hydrogen & S-Block
| 1 Crore+ students have signed up on EduRev. Have you? Download the App |
Bicarbonates of Ca and Mg are responsible for temporary hardness.
These are characteristics of perhydrol.
SiC is a giant covalent compound
BaO2 + CO2 + H2O → H2O2 + BaCO3
BeF2 is linear (sp-hybridization), H2O is angular (sp3-hybridization)
It is a fact
A solid compound ‘X’ on heating gives CO2 gas and a residue. The residue mixed with water forms ‘Y’ on passing an excess of CO2 through ‘Y’ in water, a clear solution ‘Z’ is obtained. On boiling ‘Z’ compound ‘X’ is reformed. The compound ‘X’ is:
Beryllium shows diagonal relationship with aluminium. Which of the following similaeity is incorrect?
Both Be(OH)2 and AI(OH)3 are amphoteric.
A metal M readily forms sulphate MSO4 which is water insoluble. It forms oxide MO which becomes inert on heating. It forms insoluble hydroxide which is soluble in NaOH. The metal M is:
BeSO4 and MgSO4 are soluble in water. Only BeO is amphoteric and thus reacts with NaOH
An inorganic compound liberates O2 when heated, turns an acid solution of KI brown and reduces acidified KMnO4. The substance is:
These are the oxidising and reducing properties of H2O2
First three choices are characteristics of zeolites.
When zeolites, (hydrated sodium aluminium silicate) is treated with hard water, the sodium ions are exchange with :
Na2Z + Ca2+ → CaZ + 2Na+
g-eq = V (in L)*N = 1.5
w = g eq * Meq
= 1.5 * 17 = 25.5g
There is extensive intermolecular hydrogen bonding in the condensed phase. Water is amphoteric in nature. Ice formed from D2O sinks in normal water. In photosynthesis CO2 oxidises water in presence of chlorophyll to give O2
The principal products obtained on heating iodine with concentrated caustic soda solution are:
A colourless salt gives violet colour to Bunsen flame and also turns moistured litmus paper blue. It is:
Violet colour to flame is characteristic of potassium. Also aqueous solution of K2CO3 is alkaline.
At anode :
2CI- → CI2 + 2e
At cathode :
2H+ + 2e → H2
Li2CO3 decomposes on heating
li2CO3 → Li2O + CO2
What would you observe if excess of dilute NaOH solution is added and shaken with an aqueous solution of aluminum chloride?
When sodium metal is dissolved in liquid ammonia, a blue solution is formed. The blue colour is due to:
This ammoniated electron is responsible for blue colour of solution, reducing nature and good conductor nature of solution.
Due to H-bonding
Na2S + I2 + Na2SO3 → Na2S2O3 + 2NAl
Na gives crimson yellow colour.
CsBr3 → Cs++ Br-3
Solvay process is based on electrolysis of brine (NaCI) solution.
An aqueous solution of salt of sodium (NaX) on boiling with MgCI2 gives white precipitate, hence anion X is:
2NaHCO3 + MgCl2 → MgCO3 + 2Nacl + H2O
When magnesium is burnt in air, compounds of magnesium formed are magnesium oxide and:
Disodium hydrogen phosphate in presence of NH4CI and NH4OH gives a white ppt. with a solution of Mg2+ ion. The precipitate is:
It is a method to precipitate Mg2+ ion VI group, of qualitative analysis.
If CO2 is passed in excess into lime water, the milkiness first formed disapperars due to:
A chloride dissolves appreciably in cold water. When placed on a platinum wire in Bunsen flame, no distinctive colour is noticed. Which one is cation?
PbCI2 is insoluble in cold water. Mg2+ and Pb2+ do not show flame colour
Except Be3N2, rest all are non-volatile nitrides.
The correct order of hydration energy of alkaline earth metal ion is:
maller is ion, more is hydration energy
Hydrides of alkaline earth metal (except Be) are obtained by heating them in hydrogen. BeH2 is obtained by:
S2- → S0 + 2e
The volume of ‘10 vol’ of H2O2 required to liberate 500 mL O2 at NTP is:
10 vol. H2O2 means that 1 mL H2O2 gives 10 mL O2; thus, 50 mL H2O2 will give 500 mL O2.
It is a property of hydrogen in which it resemble with halogen, Alkali metal hydrides are ionic in nature.
H2O2 restores the colour of old lead paintings, blackened by the action of H2S gas, by:
PbS + 4H2O2 → PbSO4 + 4H2O
Some statements about heavy water are given below:
(i) Heavy water is used as a moderator in nuclear reactors (ii) Heavy water is more associated than ordinary water (iii) Heavy water is more effective solvent than ordinary water
Which of the above statements are correct?
These are facts
|
1 docs|26 tests
|
|
1 docs|26 tests
|
Download free EduRev App
(Scan QR code)
|
|
|
© EduRev
|
Education Revolution
|
Follow Us
|
