Formation of Complexes

Q.

Is ${\mathbf{NO}}^{\mathbf{+}}$ Strong Field Ligand?

Q. Read the assertion and reason carefully to mark the correct option out of the options given below:

(a)If both assertion and reason are true and the reason is the correct explanation of the assertion.

(b)If both assertion and reason are true but reason is not the correct explanation of the assertion.

(c)If assertion is true but reason is false.

(d) If assertion is false but reason is true.
Assertion : $N{a}_{2}C{r}_2{O}_7$ is not a primary standard solution in volumetric analysis.

Reason : $N{a}_{2}C{r}_2{O}_7$ is hygroscopic.

1. a
2. b
3. c
4. d

Q.

Define Negative Ligands.

Q.

Is water a ligand?

Q. When sodium and chlorine atom react with each other then:

1. Energy is absorbed and covalent bond is formed
2. Energy is released and ionic bond is formed
3. Energy is released and a covalent bond is formed
4. Energy is absorbed and ionic bond is formed

Q.

How to learn a periodic table? And what I should learn in periodic table?

Q.

Question 11
Which of the following represents a correct chemical formula? Name it

$\left(a\right)$ $CaCl$
$\left(b\right)$ $BiP{O}_4$
$\left(c\right)$ $NaS{O}_4$
$\left(d\right)$ $NaS$

Q. The tendency towards complex formation is maximum in

1. s-block elements
2. p-block elements
3. d-block elements
4. f-block elements

Q.

Question 12
Write the molecular formulae for the following compounds

(a) Copper (II) bromide
(b) Aluminium (III) nitrate
(c) Calcium (II) phosphate
(d) Iron (III) sulphide
(e) Mercury (II) chloride
(f) Magnesium (II) acetate

Q. In Nessler’s reagent for detection of $N{H}_3$, the active species is

1. $H{g}_2{l}_2$
2. $Hg{l}_4^{2-}$
3. $HgC{l}_2$
4. $H{g}^{2+}$

Q.

Which alkaline earth metal is found in flares?

Q.

Copper is not a part of the alloy

1. bronze

2. brass

3. steel

4. duralumin

Q. The chemical name of the compound $FeC{l}_3$ is iron(III) chloride.

1. True
2. False

Q. $A$ imparts green color to the flame. Its solution does not give a precipitate on passing $H_{2}S$. When it is heated with solid $K_{2}C{r}_2{O}_7$ and conc. $H_{2}S{O}_4$, reddish brown gas is evolved. The gas when passed in an aqueous solution of $NaOH$ turns it yellow. Find out $A$.

1. $HgC{l}_2$
2. $BaC{l}_2$
3. Both (A) and (B)
4. None of the above

Q. The chemical name of the compound $FeC{l}_3$ is iron(III) chloride.

1. True
2. False

Q. Cigarette or gas lighter is made up of

1. Alkali metal
2. Misch metal
3. Noble metal
4. None

Q. The increased tendency for complex formation in transition metals can be attributed to

1. Small size of the cations
2. All of these
3. High effective nuclear charge
4. Availability of low-energy vacant orbitals

Q. Reducing nature of the hydrides of group 15 follow the order

1. 
2. 
3. 
4. 

Q. $2.40g$ of the chloroplatinate of a mono acid-base on ignition gave $0.8g$ of platinum. Calculate the molecular weight of the base. (Given the atomic weight of $Pt=195g/mol$).

1. $87.5g/mol$
2. $34.6g/mol$
3. $102.4g/mol$
4. $111.0g/mol$

Q. In flame test:
$S{r}^{2+}$gives apple green flame.

1. True
2. False

Q.

Name a red crystalline solid used to import green colour in fireworks.

Q. Vanadium (II) oxide is a strong

1. Drying agent
2. Oxidizing agent
3. Reducing agent
4. Wetting agent

Q. Turnbull’s blue is

1. Ferricyanide
2. copper ferricyanide
3. ferrous cyanide
4. $F{e}_4\left[Fe\right(CN{)}_6{]}_3$

Q.

Why this ZigZag line do not separate Germanium(Ge) ?

Q. What are coinage metals ??

Q. Which of the following metal is present in misch metal

1. Ni
2. Cr
3. La
4. Sc