# NSO Level 1- Science Olympiad (SOF) Class 10: Questions 8 - 13 of 986

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## Question 8

### Question

MCQ▾A class starts at 9 a. m. and lasts till Four periods are held during this interval. After every period, 5 minutes are given free to the students. The exact duration of each period is ________.

### Choices

Choice (4) | Response | |
---|---|---|

a. | 38 minutes | |

b. | 47 minutes | |

c. | 50 minutes | |

d. | 35 minutes |

## Question 9

### Question

MCQ▾Which of the following is incorrect for acid?

### Choices

Choice (4) | Response | |
---|---|---|

a. | Acid turns red litmus blue. | |

b. | All the compounds containing are acidic. | |

c. | All the acid have sour test. | |

d. | All the acids generates H-gas on reacting with metal |

## Question 10

Appeared in Year: *2011*

### Question

MCQ▾If both and belong to the set , then the number of equation of the form having real roots is ________.

### Choices

Choice (4) | Response | |
---|---|---|

a. | 12 | |

b. | 7 | |

c. | 6 | |

d. | 10 |

## Question 11

### Question

MCQ▾Four camels are tethered at four corners of a square plot of side so that the adjacent camels can just reach one another. There is a small circular pond of area at the centre. Find the ungrazed area.

### Choices

Choice (4) | Response | |
---|---|---|

a. | ||

b. | ||

c. | ||

d. |

## Question 12

Appeared in Year: *2011*

### Question

MCQ▾If , then ________

### Choices

Choice (4) | Response | |
---|---|---|

a. | 0 | |

b. | 3 | |

c. | ||

d. | 1 |

## Question 13

### Question

MCQ▾A money lender finds that due to a fall in the rate of interest from , his yearly income diminishes by ₹ 100. His capital is ________.

### Choices

Choice (4) | Response | |
---|---|---|

a. | ₹ 20000 | |

b. | ₹ 12000 | |

c. | ₹ 23500 | |

d. | ₹ 15800 |