# NSTSE (National Science Talent Search Exam- Unified Council) Class 7: Questions 1136 - 1140 of 1732

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## Question 1136

### Question

MCQ▾Chemical reactions does not produce any heat energy if:

### Choices

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

a. | Energy absorbed by the reactants is less than the energy released by the products. | |

b. | Energy absorbed by the reactants is more than the energy released by the products. | |

c. | Energy absorbed by the reactants is equal to the energy released by the products. | |

d. | Question does not provide sufficient data or is vague |

## Question 1137

### Question

MCQ▾Which one is not an oscillatory motion:

### Choices

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

a. | ||

b. | ||

c. | Motion of the hammer of an electric bell. | |

d. | None of the above |

## Question 1138

### Question

MCQ▾Which of the following always lie inside the triangle?

### Choices

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

a. | Orthocenter | |

b. | Circumcenter | |

c. | Incenter | |

d. | None of the above |

## Question 1139

### Question

MCQ▾The Circumcenter of a triangle is the point where

### Choices

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

a. | The altitudes meet | |

b. | The medians meet | |

c. | The right bisectors of the sides of the triangle meet | |

d. | The bisectors of the angles of the triangle meet |

## Question 1140

### Question

MCQ▾The arithmetic mean of first seven odd numbers is

### Choices

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

a. | 5 | |

b. | 11 | |

c. | 14 | |

d. | 7 |