. A firm had purchased goods worth Rs. 70,000 and it had an opening stock for Rs. 10,000. It sold a portion of goods for Rs. 75,000 at a gross profit of 20%. Find out its closing stock.
Answers
Answer:
All children will inherit an X chromosome from their mother regardless
of whether they are boys or girls. Thus, the sex of the children will be
determined by what they inherit from their father. A child who inherits
an X chromosome from her father will be a girl, and one who inherits a
Y chromosome from him will be a boy.
28 Use of Plastic cups raised the concern towards hygiene thus they were
replaced by disposable plastic cups.
Plastic cups are non-biodegradable and harm the environment friendly.
They were thus replaced by Kulhads.
Making Kulhad made of clay on a large scale resulted in the loss of top
fertile soil.
Now, disposable paper cups are used because - the paper can be
recycled, it is biodegradable and is eco-friendly material which does not
cause environmental pollution.
3
29 - Blood passes through filtration units in the kidney called nephron
- Passes through glomerulus in the Bowman's capsule - Ultra
filtration
- Filtrate initially has glucose, amino acids, water, salts and
nitrogenous waste
- Reabsorption – Water (as per the need of the body), Glucose and
amino acids are all reabsorbed –
- Secretion of excess water, salts and urea (nitrogenous waste)
which makes up the urine
3
30
a. Heating of lead nitrate; and electrolysis of acidified water
b.
Sunlight
2AgCl(s) 2Ag(s) + Cl2 (g)
(No deduction for not mentioning state of reactants and products.)
2
1
31 (i) D, As it is on the left side of the table in group 2
(ii) C, as it is in the group 18/ Noble gas
(iii) E, as we move from left to right across a period, atomic radius
decreases