现已上线！2025 年 Telegram 研究 — 年度关键洞察 
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The purest form of naturally occurring water is : प्राकृतिक रूप से पाए जाने वाले जल से सबसे शुद्ध होता है।
BPSC AE - 2022
Which of the following is not responsible for water pollution ?
जल प्रदूषण के लिए निम्नलिखित में से कौन जिम्मेदार नहीं होता हैं।
BPSC AE - 2022
The most common cause of acidity in water is :
BPSC AE - 2022
The temporary hardness of water is due to presence of :
JSSC JE - 2022
Which of the following is the main factor of water pollution ?
RRB JE - 2014
The pH of acid rain should always be less than :
RRB SSE & JE - 2015
The heating element of electric heater is made from:
RRB JE - 2014
Which part of a transformer is subjected to maximum heating :
RRB JE - 2015
The efficiency of power transformer is of the order of :
BPSC AE - 1995
Which one of the following substance has the largest value of young's modulus :
RRB JE - 2015
