Questions numbers 4(a) to 4(d) are based on table given below. Study the
table in which the levels of Thyroid Stimulating Hormone (TSH) in
women are given and answer the questions that follow on the basis of
understanding of the following paragraph and the related studied
concepts.
Age Range Normal (mU/L) Low (mU/L)
18-29 years
0.4 -2.34 mU/L < 0.4 mU/L
30 - 49 years
0.4 - 4.0 mU/L < 0.4 mU/L
50 - 79 years 0.46 - 4.68 mU/L <0.46 mU/L
Women are at greater risk for developing abnormal TSH levels during
menstruation, while giving birth and after going through menopause.
Around 5% of women in the United States have some kind of thyroid
problem compared to 3% of men. Despite claims that high TSH increases
your risk for heart disease, a 2013 study found no link between high TSH
and heart diseases. But a 2017 study showed that older women are
especially at risk for developing thyroid cancer if they have high TSH
levels along with thyroid nodules.
(a) A 35 year old woman has TSH level 6.03 mU/L. What change should
she bring in her diet to control this level ?
(b) When do women face a greater risk of abnormal TSH level ?
(c) State the consequence of low TSH level.
(d) Name the mineral that is responsible for synthesis of hormone
secreted by thyroid gland.
L
Answers
Answer:
Question 1: Define electropositivity.
OR
The atomic radii of first group elements are given below:
Group I Element Atomic Radii (pm)
Na 86
K 231
Rb 244
Cs 282
State the reason behind the observed trend in the above elements.
Answer: When we move from top to bottom in a group, atomic radii increase because of addition of a shell in subsequent periods in a group.
Question 2: How are covalent bonds formed?
Answer: Covalent bonds are formed by sharing of electrons.
Question 3: Questions numbers 3(a) to 3(d) are based on table given below. Study the table in which the levels of Thyroid Stimulating Hormone (TSH) in women are given and answer the questions that follow on the basis of understanding of the following paragraph and the related studied concepts.
Age Range Normal (mU/L) Low (mU/L)
18-29 years 0.4-2.34 < 0.4
30-49 years 0.4-4.0 < 0.4
50-79 years 0.4-4.68 < 0.46
Women are at greater risk for developing abnormal TSH levels during menstruation, while giving birth and after going through menopause. Around 5% of women in the United States have some kind of thyroid problem compared to 3% of men. Despite claims that high TSH increases your risk for heart disease, a 2013 study found no link between high TSH and heart diseases. But a 2017 study showed that older women are especially at risk for developing thyroid cancer if they have high TSH levels along with thyroid nodules.
(a) A 35 year old woman has TSH level 6.03 mU/L. What changes should she bring in her diet to control this level?
Answer: She should reduce her intake of carbohydrate and fat.
(b) When do women face a greater risk of abnormal TSH level?
Answer: During menstruation, during child birth and during menopause
(c) State the consequence of low TSH level?
Answer: Low TSH level can result in drastic weight loss and weakness
(d) Name the mineral that is responsible for synthesis of hormone secreted by thyroid gland.
Answer: Iodine
Question 4: Answer question numbers 4(a) to 4(d) on the basis of your understanding of the following paragraph and the related studies concepts.
The Tehri dam is the highest dam in India and one of the highest in the World. The Tehri dam withholds a reservoir of capacity 4.0 km3 and surface area of 52 km2. It is used for irrigation, municipal water supply and the generation of 1000 MW of hydro electricity.
The Tehri Dam has been the object of protests. Environment activist Shri Sunder Lal Bahuguna led the “Anti Tehri Dam Movement” from 1980s to 2014. The protest was against the displacement of town inhabitants and environmental consequences of the weak ecosystem. The relocation of more than 1,00,000 people from the area has led to protracted legal battles over resettlement rights and ultimately resulted in the delayed completion of the project.
(a) How is hydropower harnessed?
Answer: Water is collected in a reservoir behind the dam. The stored water is released to turn a turbine in order to produce electricity.
(b) Define 1 MW
Answer: 1 MW = 1000000 W
(c) Mention two disadvantages of constructing Tehri Dam.
Answer: Construction of Tehri Dam has resulted in large scale destruction of biodiversity in catchment area and large scale displacement of people.
(d) What happens when water from great heights is made to fall on blades of turbine?
Answer: Blades of turbine move and convert kinetic energy of water into electric energy.
Question 5: An element ‘X’ is forming an acidic oxide. Its position in modern periodic table will be
Group 1 and Period 3
Group 2 and Period 3
Group 13 and Period 3
Group 16 and Period 3
Answer: (d) Group 16 and Period 3
Explanation:
Answer:
When we move from top to bottom in a group, atomic radii increase because of addition of a shell in subsequent periods in a group.