Home
Class 11
CHEMISTRY
An element occupies group number 1 and p...

An element occupies group number 1 and period number 3. This element heated in air gives compound A. With water it gives compound B - a strong base. With ammonia gives compound C, which is used as a reducing agent in organic chemistry. Identify the element A,B and C.

Text Solution

Verified by Experts

(i) As per the position in the periodic table this element occupying group number 1 and period number 3 is sodium. (ii) When heated in air, it forms sodium peroxide (A)
`4 Na +O_2 rArr 2 Na_2O_2`
(iii) With water, sodium gives sodium hydroxide (B)
`2Na +2H_2O rArr 2NaOH +H_2`
(iv) With ammonia, sodium gives sodamide (I)
`2Na + 2NH_(3) overset(570-670 K)rarr 2 NaNH_2 +H_2`
The element is sodium.
The compound A is sodium peroxide.
The compound B is sodium hydroxide.
The compound C is sodamide.
Promotional Banner

Topper's Solved these Questions

  • GROUP 1 s - BLOCK ELEMENTS

    NCERT TAMIL|Exercise QUESTIONS (A. CHOOSE THE BEST ANSWER)|13 Videos

  • GROUP 1 s - BLOCK ELEMENTS

    NCERT TAMIL|Exercise QUESTIONS (B.FILL IN THE BLANKS)|15 Videos

  • ALKALI AND ALKALINE EARTH METALS

    NCERT TAMIL|Exercise EVALUATION|25 Videos

Similar Questions

Explore conceptually related problems

An element occupies group number 1 and period number 3. This element when exposed to air gives compound (A). The element with water forms compound (B). Which is a strong base und (A) with ammonia gives compound (C ) which is used as reducing agent in organic chemistry. The element reacts with an halogen and forms cooking salt (D). Identify A, B, C and D.

An element occupies group number 1 and period number 2. This element burns with air and forms compound A. With water, it gives compound B, with hydrogen it forms an ionic compound C. Identify the elements, A, B and C.

An element A occupies group number 15 and period number 3, reacts with chlorine to give compound B. The compounds B on hydrolysis gives a dibasic acid C. The compound C on heating undergoes auto oxidation and reduction to give a tribasic acid D. Identify the elements A, compounds B, C and D. Write the reactions.

An element occupies group number 2 and period number 3. This element reacts with oxygen and nitrogen to form compound A and B. It is a strong electropositive metal so it displaces Ag from AgNO_3 solution. With concentrated nitric acid, it forms compound C. Identify the element, compound A, B and C.

An element A occupies group number 15 and period number 3, exhibits allotropy and it is tetra atomic. A reacts with caustic soda to give B which is having rotten fish odour. A reacts with chlorine to give C which has a pungent odour. Identify A, B and C. Write the reactions.

An element A occupies group number 15 and period number 3, exhibits allotropy and it is tetra atomic. A reacts with caustic soda a to give B which is having rotten fish odour. A reacts with chlorine to give C which has a smell of garlic. Identity A, B and C. Write the reactions.

An element occupies group number 15 and period number 2 reacts with hydrogen under high pressure and in the presence of a catalyst it terms a hydride (A). In presence of excess of air and in the presence of platinum it forms an oxyacid (B). Identify the element, A and B.

An isotope of hydrogen (A) reacts with diatomic molecule of element which occupies group number 16 and period number 2 to give compound (B) is used as a modulator in nuclear reaction. (A) adds on to a compound (C), which has the molecular formula C3H6 to give (D). Identify A, B, C and D.

An element 'A' occupies group number 15 and period number 3. It reacts with chlorine to give B which further reacts with chlorine to give C at 273 K . Both B and C are chlorinating agents for organic compounds. C is a better chlorinating agent because it chlorinates metals also. B reacts with SO_(3) and reduces it to SO_(2) . B has a pyramidal shape. C has trigonal bipyramidal shape by sp^(3)d hybridisation. Identify the element A and the compounds B and C. Write the reactions.