Match List -I with List -II : List -I List -II a Borax i NaBO ₂ b Kernite ii &n

English

Gujarati

Hindi

p-Block Elements - I

medium

Match List$-I$ with List$-II :$

List$-I$ List$-II$

$a$ Borax $i$ $NaBO _2$

$b$ Kernite $ii$ $Na _2 B _4 O _7 .4 H _2 O$

$c$ Orthoboric acid $iii$ $H _3 BO _3$

$d$ Borax bead $iv$ $Na _2 B _4 O _7 .10 H _2 O$

Choose the correct answer from the options given below :

A$(a) - (iv), (b) - (ii), (c) - (iii), (d) - (i)$

B$(a) - (ii), (b) - (iv), (c) - (iii), (d) - (i)$

C$(a) - (iii), (b) - (i), (c) - (iv), (d) - (ii)$

D$(a) - (i), (b) - (iii), (c) - (iv), (d) - (ii)$

(NEET-2022)

Solution

Borax $- Na _2 B _4 O _7 .10 H _2 O$
Kernite $- Na _2 B _4 O _7 .4 H _2 O$
ortho boric acid $- H _3 BO _3$
Borax bead $- NaBO _2$
$(a) – (iv), (b) – (ii), (c) – (iii), (d) – (i)$

Standard 11

Chemistry

Aluminium vessels should not be washed with materials containing washing soda since

medium

In the metallurgy of aluminium, cryolite is mixed in the molten state because it

easy

Assertion : Coloured cations can be identified by borax bead test.

Reason : Transparent bead $(NaBO_2 + B_2O_3)$ forms coloured bead with coloured cation.

medium

(AIIMS-2009)

Assertion : Atomic radius of gallium is higher than that of aluminium

Reason : The presence of additional $d-$ electron offer poor screening effect for the outer electrons from increased nuclear charge.

hard

(AIIMS-2017)

Aluminum dissolves in mineral acids and aqueous alkalis and thus shows amphoteric character. A piece of aluminum foil is treated with dilute hydrochloric acid or dilute sodium hydroxide solution in a test tube and on bringing a burning match stick near the mouth of the test tube, a pop sound indicates the evolution of hydrogen gas. The same activity when performed with concentrated nitric acid, reaction doesn't proceed. Explain the reason.

medium

List$-I$	List$-II$
$a$ Borax	$i$ $NaBO _2$
$b$ Kernite	$ii$ $Na _2 B _4 O _7 .4 H _2 O$
$c$ Orthoboric acid	$iii$ $H _3 BO _3$
$d$ Borax bead	$iv$ $Na _2 B _4 O _7 .10 H _2 O$

Match List$-I$ with List$-II :$ List$-I$ List$-II$ $a$ Borax $i$ $NaBO _2$ $b$ Kernite $ii$ $Na _2 B _4 O _7 .4 H _2 O$ $c$ Orthoboric acid $iii$ $H _3 BO _3$ $d$ Borax bead $iv$ $Na _2 B _4 O _7 .10 H _2 O$ Choose the correct answer from the options given below :

Solution

Similar Questions

Aluminium vessels should not be washed with materials containing washing soda since

In the metallurgy of aluminium, cryolite is mixed in the molten state because it

Assertion : Coloured cations can be identified by borax bead test. Reason : Transparent bead $(NaBO_2 + B_2O_3)$ forms coloured bead with coloured cation.

Assertion : Atomic radius of gallium is higher than that of aluminium Reason : The presence of additional $d-$ electron offer poor screening effect for the outer electrons from increased nuclear charge.

Start a Free Trial Now

Match List$-I$ with List$-II :$

List$-I$ List$-II$

$a$ Borax $i$ $NaBO _2$

$b$ Kernite $ii$ $Na _2 B _4 O _7 .4 H _2 O$

$c$ Orthoboric acid $iii$ $H _3 BO _3$

$d$ Borax bead $iv$ $Na _2 B _4 O _7 .10 H _2 O$

Choose the correct answer from the options given below :

Assertion : Coloured cations can be identified by borax bead test.

Reason : Transparent bead $(NaBO_2 + B_2O_3)$ forms coloured bead with coloured cation.

Assertion : Atomic radius of gallium is higher than that of aluminium

Reason : The presence of additional $d-$ electron offer poor screening effect for the outer electrons from increased nuclear charge.