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प्र: A person sold two cows each for Rs.9900. If he gained 10% on one and lost 20% on the other, then which of the following is true ? 3077 0

उत्तर : 4. "None of the above"
व्याख्या :
Answer: D) None of the above Explanation: In first he got Rs. 990 But in second he lost Rs. 1980 So he lost Rs. 990.

प्र: In what way does ocean water move globally? 3075 0

उत्तर : 3. "Along warm water currents from the equator to the poles"
व्याख्या :
Answer: C) Along warm water currents from the equator to the poles Explanation:

प्र: Movement of cell against concentration gradient is called 3071 0

उत्तर : 1. "active transport"
व्याख्या :
Answer: A) active transport Explanation: The only transport method that can move species against their concentration gradient i.e, from low to high concentration is called Active transport. Facilitated diffusion only moves species down their concentration gradient i.e, from high to low concentration.

प्र: Mother’s age today is thrice as her daughter’s. After 10 years it would be just double. How old is the daughter today ? 3065 0

उत्तर : 3. "10 years"
व्याख्या :
Answer: C) 10 years Explanation: Let the age of the daughter today be ‘x’ years. Mother’s age today = 3x years After 10 years, we have 3x + 10 = 2(x + 10) x = 10 years.

प्र: If (89)2 is added to the square of a number, the answer so obtained is 16202. What is the (1/26) of that number? 3063 0

उत्तर : 3. "3.5"
व्याख्या :
Answer: C) 3.5 Explanation: Let the number is = x (89)2 + x2 = 16202 x2 = 8281 x = 91 => (1/26) of 91 = 3.5

प्र: Tract of land used for raising crops or livestock. 3063 0

उत्तर : 3. "Both A & B"
व्याख्या :
Answer: C) Both A & B Explanation: A tract of land used for raising crops or livestockcan be called a field or a farm.

प्र: Which pair of atoms has the highest electronegativity difference? (Calcium's electronegativity is 1.0 Fluorine's electronegativity is 4.0 Hydrogen's electronegativity is 2.2 Sodium's electronegativity is 0.93) 3062 0

उत्तर : 4. "Na-F"
व्याख्या :
Answer: D) Na-F Explanation: F-F = 4 - 4 = 0 Ca-F = 4 - 1 = 3.0 H-F = 4 - 2.2 = 1.8 Na-F = 4 - 0.93 = 3.07 Hence, the highest electronegativity difference is in Na-F.

प्र: P and Q were assigned to do a work for an amount of 1200. P alone can do it in 15 days while Q can do it in 12 days. With the help of R they finish the work in 6 days. Find the share of R ? 3055 0

उत्तर : 1. "120"
व्याख्या :
Answer: A) 120 Explanation: 1/15 + 1/12 + 1/R = 1/6, we got R = 60 (it means R will take 60 days to complete the work alone) so ratio of work done by P:Q:R = 1/15 : 1/12 : 1/60 = 5 : 4 : 1 so R share = (1/10) x 1200 = 120.

प्र: A person sold two cows each for Rs.9900. If he gained 10% on one and lost 20% on the other, then which of the following is true ? 3077 05b5cc6dde4d2b4197774e9e2

उत्तर : 4. "None of the above" व्याख्या :Answer: D) None of the above Explanation: In first he got Rs. 990 But in second he lost Rs. 1980 So he lost Rs. 990.

प्र: In what way does ocean water move globally? 3075 05b5cc672e4d2b4197774c082

उत्तर : 3. "Along warm water currents from the equator to the poles" व्याख्या :Answer: C) Along warm water currents from the equator to the poles Explanation:

प्र: Movement of cell against concentration gradient is called 3071 05b5cc696e4d2b4197774c565

प्र: Mother’s age today is thrice as her daughter’s. After 10 years it would be just double. How old is the daughter today ? 3065 05b5cc75ee4d2b4197774fcde

उत्तर : 3. "10 years" व्याख्या :Answer: C) 10 years Explanation: Let the age of the daughter today be ‘x’ years. Mother’s age today = 3x years After 10 years, we have 3x + 10 = 2(x + 10) x = 10 years.

प्र: If (89)2 is added to the square of a number, the answer so obtained is 16202. What is the (1/26) of that number? 3063 05b5cc6bde4d2b4197774d947

उत्तर : 3. "3.5" व्याख्या :Answer: C) 3.5 Explanation: Let the number is = x (89)2 + x2 = 16202 x2 = 8281 x = 91 => (1/26) of 91 = 3.5

प्र: Tract of land used for raising crops or livestock. 3063 05b5cc683e4d2b4197774c283

उत्तर : 3. "Both A & B" व्याख्या :Answer: C) Both A & B Explanation: A tract of land used for raising crops or livestockcan be called a field or a farm.

प्र: Which pair of atoms has the highest electronegativity difference? (Calcium's electronegativity is 1.0 Fluorine's electronegativity is 4.0 Hydrogen's electronegativity is 2.2 Sodium's electronegativity is 0.93) 3062 05b5cc669e4d2b4197774bf7c

उत्तर : 4. "Na-F" व्याख्या :Answer: D) Na-F Explanation: F-F = 4 - 4 = 0 Ca-F = 4 - 1 = 3.0 H-F = 4 - 2.2 = 1.8 Na-F = 4 - 0.93 = 3.07 Hence, the highest electronegativity difference is in Na-F.

प्र: P and Q were assigned to do a work for an amount of 1200. P alone can do it in 15 days while Q can do it in 12 days. With the help of R they finish the work in 6 days. Find the share of R ? 3055 05b5cc731e4d2b4197774f814

उत्तर : 1. "120" व्याख्या :Answer: A) 120 Explanation: 1/15 + 1/12 + 1/R = 1/6, we got R = 60 (it means R will take 60 days to complete the work alone) so ratio of work done by P:Q:R = 1/15 : 1/12 : 1/60 = 5 : 4 : 1 so R share = (1/10) x 1200 = 120.

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प्र: A person sold two cows each for Rs.9900. If he gained 10% on one and lost 20% on the other, then which of the following is true ? 3077 0

उत्तर : 4. "None of the above"
व्याख्या :
Answer: D) None of the above Explanation: In first he got Rs. 990 But in second he lost Rs. 1980 So he lost Rs. 990.

प्र: In what way does ocean water move globally? 3075 0

उत्तर : 3. "Along warm water currents from the equator to the poles"
व्याख्या :
Answer: C) Along warm water currents from the equator to the poles Explanation:

प्र: Movement of cell against concentration gradient is called 3071 0

प्र: Mother’s age today is thrice as her daughter’s. After 10 years it would be just double. How old is the daughter today ? 3065 0

उत्तर : 3. "10 years"
व्याख्या :
Answer: C) 10 years Explanation: Let the age of the daughter today be ‘x’ years. Mother’s age today = 3x years After 10 years, we have 3x + 10 = 2(x + 10) x = 10 years.

प्र: If (89)2 is added to the square of a number, the answer so obtained is 16202. What is the (1/26) of that number? 3063 0

उत्तर : 3. "3.5"
व्याख्या :
Answer: C) 3.5 Explanation: Let the number is = x (89)2 + x2 = 16202 x2 = 8281 x = 91 => (1/26) of 91 = 3.5

प्र: Tract of land used for raising crops or livestock. 3063 0

उत्तर : 3. "Both A & B"
व्याख्या :
Answer: C) Both A & B Explanation: A tract of land used for raising crops or livestockcan be called a field or a farm.

प्र: Which pair of atoms has the highest electronegativity difference? (Calcium's electronegativity is 1.0 Fluorine's electronegativity is 4.0 Hydrogen's electronegativity is 2.2 Sodium's electronegativity is 0.93) 3062 0

उत्तर : 4. "Na-F"
व्याख्या :
Answer: D) Na-F Explanation: F-F = 4 - 4 = 0 Ca-F = 4 - 1 = 3.0 H-F = 4 - 2.2 = 1.8 Na-F = 4 - 0.93 = 3.07 Hence, the highest electronegativity difference is in Na-F.

प्र: P and Q were assigned to do a work for an amount of 1200. P alone can do it in 15 days while Q can do it in 12 days. With the help of R they finish the work in 6 days. Find the share of R ? 3055 0

उत्तर : 1. "120"
व्याख्या :
Answer: A) 120 Explanation: 1/15 + 1/12 + 1/R = 1/6, we got R = 60 (it means R will take 60 days to complete the work alone) so ratio of work done by P:Q:R = 1/15 : 1/12 : 1/60 = 5 : 4 : 1 so R share = (1/10) x 1200 = 120.